ARM: dts: msm: Add pin control for display on SDM855

This change adds pin controls for panel lcd enable, reset,
panel mode selection configurations. This change also
adds the pin controls for tear-effect control signal for
command mode panels.

Change-Id: I1a1c7d1a240fec7cacaca3fd86f8a650f661b3e9
Signed-off-by: Govinda Rajulu Chenna <gchenna@codeaurora.org>