driver/tcpm: fix ps8705 definition
driver/tcpm: fix ps8705 definition

BUG=b:158760026
BRANCH=none
TEST=make -j buildall

Signed-off-by: Devin Lu <052fe648504800b810f29702ef4f3db83fad68bf@quantatw.com>
Change-Id: Iac79496b333c04b8a67225503b4d35060ddef2c1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2249641
Reviewed-by: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>

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