ARM: dts: msm: add the memory node for splash screen for msm8937

Add the DT nodes related to display splash screen for msm8937.
This is needed to make sure that continuous splash screen works
fine during boot up.

Change-Id: I7be99a2346ec4324c646f83a8d578a862a80843d
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>