Clear OPROM_NEEDED on EC update before reboot
Clear OPROM_NEEDED on EC update before reboot

This patch makes ec_sync_all clear OPROM_NEEDED flag when
ec_sync_phase2 updates EC and requests reboot.

Without this change OPROM_NEEDED flag will stay forever because after
reboot need_wait_screen won't be set (thus line 90 won't be reached).

BUG=b:72387533
BRANCH=none
TEST=Verify firmware screens are displayed on type-c monitor:
developer warning screen, critical update screen, recovery screen.

Change-Id: I9cc072efbf937ac438b55f3812f677612f79eaf9
Signed-off-by: Daisuke Nojiri <fd5f93af191bf7e8f73ea71cc3c0f66b41b1dd49@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/916635
Reviewed-by: Julius Werner <4d12f06cff3725783b352157673a720bc67c4afe@chromium.org>

coreboot/vboot,coreboot/vboot,coreboot/vboot,coreboot/vboot,coreboot/vboot