ec/google/chromeec: Check AP reset cause for watchdog reset
Different from mt8183, mt8192 doesn't need to trigger EC reboot on HW
initiated watchdog reset. Therefore, ec_reset_flags cannot be used to
determine AP watchdog reset. Instead we check the cause of the last AP
reset.
BUG=b:
174443398
TEST=emerge-asurada coreboot
TEST=crash.WatchdogCrash passed on asurada
BRANCH=none
Cq-Depend: chromium:
2607150
Change-Id: I761ecdd8811e5612b39e96c73442cc796361d0f0
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49113
Reviewed-by: Nicolas Boichat <drinkcat@google.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>