ARM: dts: msm: update the regulator/GPIO nodes for display on QM215

Update the panel reset GPIO and DSI controller supply node for
display functionality on QM215 QRD device.

Change-Id: I8ed34538946199a73124b6940797596685ecbbbd
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>