drm/amd/display: Update OPP counter from new interface

[Description]
Change to new interface for notifying OS of cursor support changes
Reviewed-by: Gang Chu <gang.chu@amd.com>
Reviewed-by: Jaina Han <jaina.han@amd.com>
Reviewed-by: Jun Lei <jun.lei@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Hong-lu Cheng <hong-lu.cheng@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -3507,7 +3507,7 @@ static void wait_for_outstanding_hw_updates(struct dc *dc, const struct dc_state
  */
 	int pipe_idx;
 	int opp_inst;
-	int opp_count = dc->res_pool->pipe_count;
+	int opp_count = dc->res_pool->res_cap->num_opp;
 	struct hubp *hubp;
 	int mpcc_inst;
 	const struct pipe_ctx *pipe_ctx;