mach-snapdragon: of_fixup: skip disabled USB nodes

There's no need to waste time fixing up nodes that aren't used on this
device. Skip them.

Reviewed-by: Sumit Garg <sumit.garg@oss.qualcomm.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Tested-by: Sumit Garg <sumit.garg@oss.qualcomm.com>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>

arch/arm/mach-snapdragon/of_fixup.c

@@ -108,7 +108,9 @@ static void fixup_usb_nodes(struct device_node *root)
 	int ret;
 
 	while ((glue_np = of_find_compatible_node(glue_np, NULL, "qcom,dwc3"))) {
-		ret = fixup_qcom_dwc3(glue_np);
+		if (!of_device_is_available(glue_np))
+			continue;
+		ret = fixup_qcom_dwc3(root, glue_np);
 		if (ret)
 			log_warning("Failed to fixup node %s: %d\n", glue_np->name, ret);
 	}