ARM: dts: msm: Enable Parital update for truly 720p panel on msmgold

Enable partial update for 720p cmd mode panel to realize power savings
in use cases where updating region is less than panel size.

Change-Id: I329ab8061be1caabfe7eb028902dbbb0f8a00eb4
Signed-off-by: Vishnuvardhan Prodduturi <vproddut@codeaurora.org>