primus: Add TBT power control
primus: Add TBT power control

BUG=b:190679469
BRANCH=none
TEST=make buildall

Signed-off-by: Scott Chao <8cefa9751fac9aaa897ba1213763a96ba8dbd20d@wistron.corp-partner.google.com>
Change-Id: I846f202f7b4dd1a46109210d14afa1089e8c59dc
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2975159
Reviewed-by: Boris Mittelberg <46897f4fb5cad4b1d5146ad1fd460d7f4825bbf7@google.com>

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