disp: msm: sde: fix cache controller node parse logic

Cache controller is not a sde property, add
proper parsing logic to get the compatible version
of llcc cache.

Featurise system cache support with a catalog entry as it
provides a finer control to enable/disable llcc
for display.

Change-Id: I07fa8e144d0a4fa32ab16e46142c7b68f771d9c7
Signed-off-by: Krishna Manikandan <mkrishn@codeaurora.org>