ARM: dts: msm: Add wait in dynamic switch command for nt35590 panel

Add one vsync wait in dynamic switch command for nt35590 720p panel.
This makes sure after enabling the panel GRAM there is one frame
transferred before switching to command mode.

Change-Id: I7be263b02e20751b42d350870d5d2e9f3253d15e
Signed-off-by: Shivaraj Shetty <shivaraj@codeaurora.org>