drm/msm/a6xx: Add missing suspend_count increment

Reported-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Fixes: 3ab1c5cc ("drm/msm: Add param for userspace to query suspend count")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20220113163215.215367-1-robdclark@gmail.comSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

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

@@ -1560,6 +1560,8 @@ static int a6xx_pm_suspend(struct msm_gpu *gpu)
 		for (i = 0; i < gpu->nr_rings; i++)
 			a6xx_gpu->shadow[i] = 0;
 
+	gpu->suspend_count++;
+
 	return 0;
 }