platform/chrome: cros_ec_typec: Use existing feature check

Replace the cros_typec_feature_supported() function with the
pre-existing cros_ec_check_features() function which does the same
thing.

Signed-off-by: Prashant Malani <pmalani@chromium.org>
Link: https://lore.kernel.org/r/20210803173619.91539-2-pmalani@chromium.org
Signed-off-by: Benson Leung <bleung@chromium.org>