dolby: Display flickers with garbage image [1/1]

PD#OTT-5577

Problem:
when scale down, scaler+dolby h-timing too tight

Solution:
reduce htotal_add to 0xc0 when 4k output

Verify:
u212

Change-Id: I190ec235370d9ed75f9c1f477c1419c383b0a8e7
Signed-off-by: yao liu <yao.liu@amlogic.com>

drivers/amlogic/media/enhancement/amdolby_vision/amdolby_vision.c

@@ -2504,6 +2504,10 @@ static void apply_stb_core_settings(
 				g_vpotch = 0x60;
 			else
 				g_vpotch = 0x20;
+			if (vinfo->width > 1920)
+				htotal_add = 0xc0;
+			else
+				htotal_add = 0x140;
 		} else
 			g_vpotch = 0x20;
 	}