ARM: dts: msm: Add pin configuration for USB3 PHY portselect

TLMM pin 81 is used to indicate to the USB3/DP Combo PHY the
orientation that which the PMIC detected a USB-C connection.
Select this pinctrl from the usb_qmp_dp_phy device and ensure
it is selecting the "usb_phy" pin function.

Change-Id: I2429bcaf28dfb8a570feab31955b595adfd0b215