OMAP-GPMC: driver updates for v4.16

* Error out only if both 'bank-width' and 'gpmc,device-width' DT properties are missing.
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Merge tag 'gpmc-omap-for-v4.16-immutable' of https://github.com/rogerq/linux into next/drivers

Pull "OMAP-GPMC: driver updates for v4.16" from Roger Quadros:

* Error out only if both 'bank-width' and 'gpmc,device-width' DT properties are missing.

* tag 'gpmc-omap-for-v4.16-immutable' of https://github.com/rogerq/linux:
  memory: omap-gpmc: Make 'bank-width' property optional

drivers/memory/omap-gpmc.c

@@ -2077,8 +2077,9 @@ static int gpmc_probe_generic_child(struct platform_device *pdev,
 	} else {
 		ret = of_property_read_u32(child, "bank-width",
 					   &gpmc_s.device_width);
-		if (ret < 0) {
-			dev_err(&pdev->dev, "%pOF has no 'bank-width' property\n",
+		if (ret < 0 && !gpmc_s.device_width) {
+			dev_err(&pdev->dev,
+				"%pOF has no 'gpmc,device-width' property\n",
 				child);
 			goto err;
 		}