Snappy: enable tcpc-controlled drp toggle
Snappy: enable tcpc-controlled drp toggle

BUG=None
BRANCH=None
TEST=make buildall

Change-Id: Icdeb4c67234c863128d1d3dd9bdecd149ee866ce
Signed-off-by: Bruce.Wan <a898a81068da7266439365c3bd380deb6a0a895f@quantatw.com>
Reviewed-on: https://chromium-review.googlesource.com/409733
Commit-Ready: Devin Lu <052fe648504800b810f29702ef4f3db83fad68bf@quantatw.com>
Tested-by: Devin Lu <052fe648504800b810f29702ef4f3db83fad68bf@quantatw.com>
Reviewed-by: Shawn N <5259333ce42e3ace6a73988cec7115ed9d3a661a@chromium.org>

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