drm/msm/mdp5: 8x16 actually has 8 mixer stages

Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/mdp/mdp5/mdp5_cfg.c

@@ -282,7 +282,7 @@ const struct mdp5_cfg_hw msm8x16_config = {
 	.lm = {
 		.count = 2, /* LM0 and LM3 */
 		.base = { 0x44000, 0x47000 },
-		.nb_stages = 5,
+		.nb_stages = 8,
 		.max_width = 2048,
 		.max_height = 0xFFFF,
 	},