Update TCPCI to match specification version RC3.
BUG=none
BRANCH=none
TEST=tested on glados and samus by plugging in a zinger with
both polarities and verifying we make a power contract.
Change-Id: I9cd6d8db7b7149995847ec1b071fba1f4d4cd5a3
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/299713
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>