Reef: Lock EC and PD communication
Reef: Lock EC and PD communication

This patch locks the ec.

This also locks PD communication until sysjump to RW.
We don't want to allow communication to outside world until
we jump to RW. This can by overridden with the removal of
the write protect screw to allow for easier testing.

Electro doesn't operate on 15w power normally but 15w is enough for
recovery process.

BUG=chrome-os-partner:62487,chrome-os-partner:61801
BRANCH=none
TEST=flash -p ec --wp-enable.
Boot, shutdown, suspend, resume, & charge Electro. Run recovery
process with battery 2% charged and a charger on port 0.

Change-Id: I634291c00eb471e24ed2b06444302d9e2e42bbc8
Signed-off-by: Daisuke Nojiri <fd5f93af191bf7e8f73ea71cc3c0f66b41b1dd49@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/435005
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