ec/google/chromeec: Update ec_commands.h
This change copies ec_commands.h from Chromium OS EC repo at
7b6cb69db.
The change also drops unneeded empty lines and coverts license header
to SPDX style.
BUG=b:
147789962
BRANCH=none
TEST=emerge-asurada coreboot
Change-Id: I9816dab5edb418e76896355a0802c59307c664c4
Signed-off-by: Yidi Lin <yidi.lin@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46403
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>