drm/msm: fix unbalanced pm_runtime_enable in adreno_gpu_{init, cleanup}

adreno_gpu_init calls pm_runtime_enable, so adreno_gpu_cleanup needs to
call pm_runtime_disable.
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Signed-off-by: Rob Clark <robdclark@chromium.org>

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

@@ -1021,11 +1021,14 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 void adreno_gpu_cleanup(struct adreno_gpu *adreno_gpu)
 {
 	struct msm_gpu *gpu = &adreno_gpu->base;
+	struct msm_drm_private *priv = gpu->dev->dev_private;
 	unsigned int i;
 
 	for (i = 0; i < ARRAY_SIZE(adreno_gpu->info->fw); i++)
 		release_firmware(adreno_gpu->fw[i]);
 
+	pm_runtime_disable(&priv->gpu_pdev->dev);
+
 	icc_put(gpu->icc_path);
 	icc_put(gpu->ocmem_icc_path);