drm/amd/display: set optimized required for comp buf changes

[Description]
When compressed buffer allocation changes, optimized required flag should be
set to trigger an update in optimize bandwidth.

Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Stylon Wang <stylon.wang@amd.com>
Signed-off-by: Dillon Varone <Dillon.Varone@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>