mdio: mdio-mux-mmioreg: Use of_property_read_reg() to parse "reg"

Use the recently added of_property_read_reg() helper to get the
untranslated "reg" address value.

Signed-off-by: Rob Herring <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/mdio/mdio-mux-mmioreg.c

···
 	 * set any bits outside of the 'mask'.
 	 */
 	for_each_available_child_of_node(np, np2) {
-		iprop = of_get_property(np2, "reg", &len);
-		if (!iprop || len != sizeof(uint32_t)) {
+		u64 reg;
+
+		if (of_property_read_reg(np2, 0, &reg, NULL)) {
 			dev_err(&pdev->dev, "mdio-mux child node %pOF is "
 				"missing a 'reg' property\n", np2);
 			of_node_put(np2);
 			return -ENODEV;
 		}
-		if (be32_to_cpup(iprop) & ~s->mask) {
+		if ((u32)reg & ~s->mask) {
 			dev_err(&pdev->dev, "mdio-mux child node %pOF has "
 				"a 'reg' value with unmasked bits\n",
 				np2);