make_dev_firmware.sh: update pattern for matching wp status

flashrom wp_status reporting has been changed with crrev/c/4630571
therefore the matching pattern needs to be changed accordingly.

BUG=b:301969847
TEST=test the script on dut
BRANCH=none

Signed-off-by: YH Lin <yueherngl@chromium.org>
Change-Id: I614c13774aab79c573edf3bbc8be9216262d40f4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/4912891
Commit-Queue: Hsuan Ting Chen <roccochen@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Hsuan Ting Chen <roccochen@chromium.org>
(cherry picked from commit 1ac4663e62575c45d7dde2192d3e7e9cc3b401ec)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/4913490
diff --git a/scripts/image_signing/make_dev_firmware.sh b/scripts/image_signing/make_dev_firmware.sh
index a7049ee..601268b 100755
--- a/scripts/image_signing/make_dev_firmware.sh
+++ b/scripts/image_signing/make_dev_firmware.sh
@@ -96,7 +96,7 @@
   echo "Disabling system software write protection status..."
   (flashrom_bios --wp-disable && flashrom_bios --wp-status) 2>&1 |
     tee "$EXEC_LOG" |
-    grep -q '^WP: .* is disabled\.$'
+    grep -q '^Protection mode: disabled$'
 }
 
 # Reads ${IMAGE_BIOS} from ${FLAGS_from} and ${IMAGE_EC} from ${FLAGS_ec_from}