To support MDP LUT retention, programming of the disp cc memory region
is required.
Update the sun DTSI definition to define the minimal disp cc
memory region needed for LUT retention functionality.
Change-Id: I88eb0860a540e5f83ae86e5491f31aa19fbdac38
Signed-off-by: Christopher Braga <quic_cbraga@quicinc.com>