Check if ESC+Power+Refresh is pressed at startup, if the recovery
combination is detected, record it to allow U-Boot to go into recovery.
The status of the keyboard recovery can be read from the response of the
EC_CMD_MKBP_INFO command.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BUG=chrome-os-partner:9916
TEST=On Snow, do a recovery reset by pressing ESC+Refresh+Power and see
the trace, try other resets and don't see it.
Change-Id: I0e1a8214781a6e74bd90bf8313887a9dcf4df56d