ARM: dts: msm: Add panel mode gpio for all supported displays on SDM845

Add panel mode select gpio for all supported displays for SDM845.
Panel mode select GPIO will be responsible for switching from DSC vs
non DSC mode.

Change-Id: I0ea0aff15b60b35cafb00e72b63a9157226e0a01
Signed-off-by: Shashank Babu Chinta Venkata <sbchin@codeaurora.org>