drm/amd/display: Cache cursor when cursor exceeds 64x64

[Why]
When Static screen from MALL, the cursor needs to be
cached if cursor exceeds 64x64 size.

[How]
Program the bit that cache cursor in MALL when size
of the cursor exceeds 64x64.

Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Acked-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Chris Park <chris.park@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>