ARM: dts: msm: Add DT properties to enable DP on sm6150 target

Add or modify the device tree switch, gpio, pll, clocks and
register properties for DisplayPort bringup on sm6150 target.

Change-Id: Icca479d6d2090b31d946dfeed700423cdc36f7af
Signed-off-by: Sankeerth Billakanti <sbillaka@codeaurora.org>