tests: Make overlay/plugin tests unconditional

When overlay apply supprt was added to libfdt the testcases included some
which could only be executed with the (then) out of tree dtc with overlay
output support.  So, the test script automatically skipped those tests if
it wasn't available.

Now that the overlay support is merged into dtc mainline there's no reason
to keep this logic.  Instead run all the overlay tests unconditionally.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
diff --git a/tests/run_tests.sh b/tests/run_tests.sh
index b8e7d44..a1baf7a 100755
--- a/tests/run_tests.sh
+++ b/tests/run_tests.sh
@@ -170,47 +170,44 @@
 		path_prop"
 
 overlay_tests () {
-    # Overlay tests that don't require overlay support in dtc
+    # Overlay tests for libfdt alone
     run_dtc_test -I dts -O dtb -o overlay_base_no_symbols.test.dtb overlay_base.dts
     run_dtc_test -I dts -O dtb -o overlay_overlay_no_symbols.test.dtb overlay_overlay_nodtc.dts
     run_test overlay overlay_base_no_symbols.test.dtb overlay_overlay_no_symbols.test.dtb
 
-    # Overlay tests that requires overlay support in dtc
-    echo "/dts-v1/; / {};" | $DTC -@ > /dev/null 2>&1
-    if [ $? -eq 0 ]; then
-        run_dtc_test -@ -I dts -O dtb -o overlay_base_with_symbols.test.dtb overlay_base.dts
-        run_dtc_test -@ -I dts -O dtb -o overlay_overlay_with_symbols.test.dtb overlay_overlay_dtc.dts
-        run_test overlay overlay_base_with_symbols.test.dtb overlay_overlay_with_symbols.test.dtb
+    # Overlay tests for dtc
+    run_dtc_test -@ -I dts -O dtb -o overlay_base_with_symbols.test.dtb overlay_base.dts
+    run_dtc_test -@ -I dts -O dtb -o overlay_overlay_with_symbols.test.dtb overlay_overlay_dtc.dts
+    run_test overlay overlay_base_with_symbols.test.dtb overlay_overlay_with_symbols.test.dtb
 
-        # Test symbols/fixups existence
-        run_test check_path overlay_overlay_with_symbols.test.dtb exists "/__symbols__"
-        run_test check_path overlay_overlay_with_symbols.test.dtb exists "/__fixups__"
-        run_test check_path overlay_overlay_with_symbols.test.dtb exists "/__local_fixups__"
+    # Test symbols/fixups existence
+    run_test check_path overlay_overlay_with_symbols.test.dtb exists "/__symbols__"
+    run_test check_path overlay_overlay_with_symbols.test.dtb exists "/__fixups__"
+    run_test check_path overlay_overlay_with_symbols.test.dtb exists "/__local_fixups__"
 
-        # test plugin source to dtb and back
-        run_dtc_test -@ -I dtb -O dts -o overlay_overlay_dtc.test.dts overlay_overlay_with_symbols.test.dtb
-        run_dtc_test -@ -I dts -O dtb -o overlay_overlay_with_symbols.test.test.dtb overlay_overlay_dtc.test.dts
-        run_test dtbs_equal_ordered overlay_overlay_with_symbols.test.dtb overlay_overlay_with_symbols.test.test.dtb
+    # test plugin source to dtb and back
+    run_dtc_test -@ -I dtb -O dts -o overlay_overlay_dtc.test.dts overlay_overlay_with_symbols.test.dtb
+    run_dtc_test -@ -I dts -O dtb -o overlay_overlay_with_symbols.test.test.dtb overlay_overlay_dtc.test.dts
+    run_test dtbs_equal_ordered overlay_overlay_with_symbols.test.dtb overlay_overlay_with_symbols.test.test.dtb
 
-        # test plugin auto-generation without using -@
-        run_dtc_test -I dts -O dtb -o overlay_overlay_with_symbols_auto.test.dtb overlay_overlay_dtc.dts
-        run_test check_path overlay_overlay_with_symbols_auto.test.dtb exists "/__symbols__"
-        run_test check_path overlay_overlay_with_symbols_auto.test.dtb exists "/__fixups__"
-        run_test check_path overlay_overlay_with_symbols_auto.test.dtb exists "/__local_fixups__"
+    # test plugin auto-generation without using -@
+    run_dtc_test -I dts -O dtb -o overlay_overlay_with_symbols_auto.test.dtb overlay_overlay_dtc.dts
+    run_test check_path overlay_overlay_with_symbols_auto.test.dtb exists "/__symbols__"
+    run_test check_path overlay_overlay_with_symbols_auto.test.dtb exists "/__fixups__"
+    run_test check_path overlay_overlay_with_symbols_auto.test.dtb exists "/__local_fixups__"
 
-        # Test suppression of fixups
-        run_dtc_test -@ -I dts -O dtb -o overlay_base_with_symbols_no_fixups.test.dtb overlay_base_fixups.dts
-        run_test check_path overlay_base_with_symbols_no_fixups.test.dtb exists "/__symbols__"
-        run_test check_path overlay_base_with_symbols_no_fixups.test.dtb not-exists "/__fixups__"
-        run_test check_path overlay_base_with_symbols_no_fixups.test.dtb not-exists "/__local_fixups__"
+    # Test suppression of fixups
+    run_dtc_test -@ -I dts -O dtb -o overlay_base_with_symbols_no_fixups.test.dtb overlay_base_fixups.dts
+    run_test check_path overlay_base_with_symbols_no_fixups.test.dtb exists "/__symbols__"
+    run_test check_path overlay_base_with_symbols_no_fixups.test.dtb not-exists "/__fixups__"
+    run_test check_path overlay_base_with_symbols_no_fixups.test.dtb not-exists "/__local_fixups__"
 
-        # Test generation of aliases insted of symbols
-        run_dtc_test -A -I dts -O dtb -o overlay_overlay_with_aliases.dtb overlay_overlay_dtc.dts
-        run_test check_path overlay_overlay_with_aliases.dtb exists "/aliases"
-        run_test check_path overlay_overlay_with_aliases.dtb exists "/__symbols__"
-        run_test check_path overlay_overlay_with_aliases.dtb exists "/__fixups__"
-        run_test check_path overlay_overlay_with_aliases.dtb exists "/__local_fixups__"
-    fi
+    # Test generation of aliases insted of symbols
+    run_dtc_test -A -I dts -O dtb -o overlay_overlay_with_aliases.dtb overlay_overlay_dtc.dts
+    run_test check_path overlay_overlay_with_aliases.dtb exists "/aliases"
+    run_test check_path overlay_overlay_with_aliases.dtb exists "/__symbols__"
+    run_test check_path overlay_overlay_with_aliases.dtb exists "/__fixups__"
+    run_test check_path overlay_overlay_with_aliases.dtb exists "/__local_fixups__"
 
     # Bad fixup tests
     for test in $BAD_FIXUP_TREES; do