disp: msm: sde: enable system cache support for shima

This change enables system cache support for shima
target which allows sde to read image from system
cache instead of DDR memory during static display
for video mode panels.

Change-Id: I2d7e17c4a6f6b477acf84fd2914c8db2d83df286
Signed-off-by: Krishna Manikandan <mkrishn@codeaurora.org>