servo_v4: print PD-comm capability with cc command
servo_v4: print PD-comm capability with cc command

Support to print the PD-comm information for FAFT.

BRANCH=servo
BUG=b:150185455
TEST=ensure cc print the correct output at SNK/SRC roles

Cq-Depend: chromium:2072543, chromium:2073423
Change-Id: Ia8c8a373eaab31a13f70e3422bf6dafcc27f92f1
Signed-off-by: Eric Yilun Lin <2f2733c7206ea2b76bd2db1905cc5e8a75841c48@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2072567
Reviewed-by: Wai-Hong Tam <04b587fdf5845741a0c5a8b9cd59ca72d73ef8fc@google.com>

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