drm/msm: Fix UBWC macrotile_mode for a680

Make it match the MDSS settings for sc8180x and downstream.

Note that without the previous commit that exposes the value of
macrotile_mode to mesa, this will break mesa which expects the legacy
default value of 0. Therefore we do *not* want to backport it.
Signed-off-by: Connor Abbott <cwabbott0@gmail.com>
Patchwork: https://patchwork.freedesktop.org/patch/607398/Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/adreno/a6xx_gpu.c

@@ -519,6 +519,9 @@ static void a6xx_calc_ubwc_config(struct adreno_gpu *gpu)
 	if (adreno_is_a640_family(gpu))
 		gpu->ubwc_config.amsbc = 1;
 
+	if (adreno_is_a680(gpu))
+		gpu->ubwc_config.macrotile_mode = 1;
+
 	if (adreno_is_a650(gpu) ||
 	    adreno_is_a660(gpu) ||
 	    adreno_is_a690(gpu) ||