We need to support RTC in ramstage so that we can see correct timestamp
in ChromiumOS eventlog.
BUG=b:134461866
TEST='mosys eventlog list' shows correct timestamp on Kukui
Change-Id: Idb0fe5c05e4ecdf0e6398e3c781c71d14f85f19b
Signed-off-by: You-Cheng Syu <youcheng@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33355
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
10494c497f