ARM: dts: msm: add the lphw support for minidp hpd on sm6150

Add the DT properties to support miniDP HPD connect pulse
detection thorugh TLMM gpio controller and the HPD_IRQ/UNPLUG
pulse detection through DP TX controller.

Change-Id: I2540f735dd0c11995ecb56b6a4863c03b01f8671
Signed-off-by: Sankeerth Billakanti <sbillaka@codeaurora.org>