pyro: add ANX74XX low power mode for different DRP state
pyro: add ANX74XX low power mode for different DRP state

Follow reef setting.

BUG=chrome-os-partner:58384
BRANCH=reef
TEST=make buildall

Change-Id: Icd661ed4ab78a7c8d2d5f1694934ad6723db2ddb
Signed-off-by: Bruce.Wan <a898a81068da7266439365c3bd380deb6a0a895f@quantatw.com>
Reviewed-on: https://chromium-review.googlesource.com/442254
Commit-Ready: Devin Lu <052fe648504800b810f29702ef4f3db83fad68bf@quantatw.com>
Tested-by: Devin Lu <052fe648504800b810f29702ef4f3db83fad68bf@quantatw.com>
Reviewed-by: Aaron Durbin <af0622ab041e8b0f8e5819838dcc93898196e71f@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec