[wlan][iwlwifi] re-format BUILD.gn

BUG=WLAN-1129
TEST=Change format and should not break the build.

Change-Id: Iebfb9e4362815a227bf13a2981fc26071e528f18
diff --git a/src/connectivity/wlan/drivers/third_party/intel/iwlwifi/BUILD.gn b/src/connectivity/wlan/drivers/third_party/intel/iwlwifi/BUILD.gn
index 6c7a0d3..38cc70d 100644
--- a/src/connectivity/wlan/drivers/third_party/intel/iwlwifi/BUILD.gn
+++ b/src/connectivity/wlan/drivers/third_party/intel/iwlwifi/BUILD.gn
@@ -49,13 +49,13 @@
   ]
 
   sources = iwlwifi_core_srcs + [
-    "pcie/drv.c",
-    "pcie/internal.h",
-    "pcie/trans-gen2.c",
-    "pcie/trans.c",
-    "pcie/tx-gen2.c",
-    "pcie/tx.c",
-  ]
+              "pcie/drv.c",
+              "pcie/internal.h",
+              "pcie/trans-gen2.c",
+              "pcie/trans.c",
+              "pcie/tx-gen2.c",
+              "pcie/tx.c",
+            ]
 
   deps = [
     "//garnet/lib/wlan/protocol",
@@ -121,4 +121,4 @@
     "//src/connectivity/wlan/drivers/testing/lib/sim-device:simdevice",
     "//zircon/public/lib/ddk",
   ]
-}
\ No newline at end of file
+}