drm/fsl-dcu: unload driver before disabling clocks

Use drm_put_dev to unload the driver before disabling clocks.
Otherwise the driver might read a register during unload which
leads to an external abort.

Signed-off-by: Stefan Agner <stefan@agner.ch>

drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c

@@ -428,9 +428,9 @@ static int fsl_dcu_drm_remove(struct platform_device *pdev)
 {
 	struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
 
+	drm_put_dev(fsl_dev->drm);
 	clk_disable_unprepare(fsl_dev->clk);
 	clk_unregister(fsl_dev->pix_clk);
-	drm_put_dev(fsl_dev->drm);
 
 	return 0;
 }