servo_v4: Add in missing controls used for USB detection/activation.

Added in the missing controls as aliases or new controls:
- usb_mux_oe1
- prtctl4_pwren
- usb_mux_sel1

TEST=passed platform_ServoPowerStateController and could successfully
probe for correct usb device.

Change-Id: I4673145d7502ce03c159506b4bceb3cc88669b2c
Commit-Ready: Kevin Cheng <>
Tested-by: Kevin Cheng <>
Reviewed-by: Nick Sanders <>
Reviewed-by: Kevin Cheng <>
1 file changed