gpu: ipu-v3: Stop overwriting pdev->dev.of_node of child devices

Setting dev->of_node changes the modalias and breaks module autoloading.
Since there is an of_node field in the platform data passed to child
devices, we don't even need this anymore.
Suggested-by: Russell King <linux@armlinux.org.uk>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

drivers/gpu/ipu-v3/ipu-common.c

@@ -1238,12 +1238,6 @@ static int ipu_add_client_devices(struct ipu_soc *ipu, unsigned long ipu_base)
 			platform_device_put(pdev);
 			goto err_register;
 		}
-
-		/*
-		 * Set of_node only after calling platform_device_add. Otherwise
-		 * the platform:imx-ipuv3-crtc modalias won't be used.
-		 */
-		pdev->dev.of_node = of_node;
 	}
 
 	return 0;