drm/amd/display: Remove redundant condition in dml vba

Found by 0-day
https://lists.freedesktop.org/archives/dri-devel/2017-October/154698.html

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@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/dml/display_mode_vba.c

@@ -3463,7 +3463,7 @@ bool Calculate256BBlockSizes(
 		unsigned int *BlockWidth256BytesC)
 {
 	if ((SourcePixelFormat == dm_444_64 || SourcePixelFormat == dm_444_32
-			|| SourcePixelFormat == dm_444_16 || SourcePixelFormat == dm_444_16
+			|| SourcePixelFormat == dm_444_16
 			|| SourcePixelFormat == dm_444_8)) {
 		if (SurfaceTiling == dm_sw_linear) {
 			*BlockHeight256BytesY = 1;