drm/amd/display: Initialize data structure for DalMpVisualConfirm.

[Why] Prevent unexpected color shows if DalMpVisualConfirm enable.
[How] Zero out color configuration data for DalMpVisualConfirm when initiating.

Signed-off-by: Hugo Hu <hugo.hu@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

@@ -1851,7 +1851,7 @@ static void update_dpp(struct dpp *dpp, struct dc_plane_state *plane_state)
 static void dcn10_update_mpcc(struct dc *dc, struct pipe_ctx *pipe_ctx)
 {
 	struct hubp *hubp = pipe_ctx->plane_res.hubp;
-	struct mpcc_blnd_cfg blnd_cfg;
+	struct mpcc_blnd_cfg blnd_cfg = {0};
 	bool per_pixel_alpha = pipe_ctx->plane_state->per_pixel_alpha && pipe_ctx->bottom_pipe;
 	int mpcc_id;
 	struct mpcc *new_mpcc;