drm/msm/a6xx: Fix A702 UBWC mode

UBWC_MODE is a one-bit-wide field, so a value of 2 is obviously bogus.

Replace it with the correct value (0).

Fixes: 18397519 ("drm/msm/adreno: Add A702 support")
Reported-by: Connor Abbott <cwabbott0@gmail.com>
Closes: https://lore.kernel.org/linux-arm-msm/CACu1E7FTN=kwaDJMNiTmFspALzj2+Q-nvsN5ugi=vz4RdUGvGw@mail.gmail.com/Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/597359/Signed-off-by: Rob Clark <robdclark@chromium.org>

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

@@ -547,7 +547,7 @@ static void a6xx_calc_ubwc_config(struct adreno_gpu *gpu)
 	if (adreno_is_a702(gpu)) {
 		gpu->ubwc_config.highest_bank_bit = 14;
 		gpu->ubwc_config.min_acc_len = 1;
-		gpu->ubwc_config.ubwc_mode = 2;
+		gpu->ubwc_config.ubwc_mode = 0;
 	}
 }