ARM: dts: msm: add the pinctrl dtsi nodes for DP for SDM845

Add the dtsi nodes for the Display Port pinctrl configurations
for the DP AUX and USB plug CC GPIOs for SDM845.

Change-Id: I72f6a4079de6a1b176c45efab61e9574e5cc5f9f
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>