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