qcom: smb-lib: Disable HW trigger when forcing sink-only mode

Due to an existing HW workaround, the UFP_EN_CMD bit may end up
getting cleared even after having been set. The result of this
is the Type-C state machine returns to DRP behavior despite SW
intention to force sink mode, such as PR Swap or Try.SNK.

Temporarily disable this particular HW trigger whenever the
typec_power_role property is getting set to sink-only mode, and
restore it when leaving sink mode.

Change-Id: I21e840bfeee3ad88b0562645378b1fea200e3803
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>