driver/tcpm/it83xx: turn both cc pins off when disable Vconn
driver/tcpm/it83xx: turn both cc pins off when disable Vconn

If the pd port has previous connection and supplies
Vconn, then RO jumping to RW reset the system,
we never know which cc is the previous Vconn pin,
so we always turn both cc pins off when disable
Vconn power switch.

BUG=b:199461325
BRANCH=none
TEST=on board haboki, RO jump to RW, check Vconn low
     and pd can nego

Signed-off-by: Ruibin Chang <6748d95250dd3d29f04d200035d5434f3b7820ef@ite.com.tw>
Change-Id: I526af287d3f52ca27c38f342553aac9b3a241d84
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3178341
Reviewed-by: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>
Reviewed-by: Zick Wei <3d0b14a1e83601e71d11cd2c38ee93ff1dbbc737@quanta.corp-partner.google.com>
Tested-by: Zick Wei <3d0b14a1e83601e71d11cd2c38ee93ff1dbbc737@quanta.corp-partner.google.com>
Commit-Queue: Diana Z <cb2016afc7183e5356c690dc63b4ba817470501a@chromium.org>

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