drm/arm: Replace instances of drm_dev_unref with drm_dev_put.

Replace drm_dev_unref with drm_dev_put as it is more consistent
with kernel coding style. Done using the following semantic
patch by coccinelle.

@r@
expression e;
@@

-drm_dev_unref();
+drm_dev_put();

Signed-off-by: Srishti Sharma <srishtishar@gmail.com>
[split patch into hdlcd and mali-dp versions]
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>

drivers/gpu/drm/arm/malidp_drv.c

@@ -671,7 +671,7 @@ query_hw_fail:
 		malidp_runtime_pm_suspend(dev);
 	drm->dev_private = NULL;
 	dev_set_drvdata(dev, NULL);
-	drm_dev_unref(drm);
+	drm_dev_put(drm);
 alloc_fail:
 	of_reserved_mem_device_release(dev);
 
@@ -704,7 +704,7 @@ static void malidp_unbind(struct device *dev)
 		malidp_runtime_pm_suspend(dev);
 	drm->dev_private = NULL;
 	dev_set_drvdata(dev, NULL);
-	drm_dev_unref(drm);
+	drm_dev_put(drm);
 	of_reserved_mem_device_release(dev);
 }