The code for warm reboot is overly specialized, and makes it hard to
add other key cominations for testing.
BUG=chrome-os-partner:13763
BRANCH=link
TEST=manual
1. boot system
2. hold down (in order) R+T+alt+VolUp. System does not reboot.
3. let go of T (so only R+alt+volup are pressed). System reboots.
Change-Id: I14cdb7f790e8a772712085a77eaf4299487788db
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/32439
Reviewed-by: Simon Glass <sjg@chromium.org>