of_mdio: use of_property_read_u32_array()

The "fixed-link" prop support predated of_property_read_u32_array(), so
basically had to open-code it. Using the modern API saves 24 bytes of the
object code (ARM gcc 4.8.5); the only behavior change would be that the
prop length check is now less strict (however the strict pre-check done
in of_phy_is_fixed_link() is left intact anyway)...

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/of/of_mdio.c

@@ -421,10 +421,10 @@ int of_phy_register_fixed_link(struct device_node *np)
 {
 	struct fixed_phy_status status = {};
 	struct device_node *fixed_link_node;
-	const __be32 *fixed_link_prop;
+	u32 fixed_link_prop[5];
 	struct phy_device *phy;
 	const char *managed;
-	int link_gpio, len;
+	int link_gpio;
 
 	if (of_property_read_string(np, "managed", &managed) == 0) {
 		if (strcmp(managed, "in-band-status") == 0) {
@@ -459,13 +459,13 @@ int of_phy_register_fixed_link(struct device_node *np)
 	}
 
 	/* Old binding */
-	fixed_link_prop = of_get_property(np, "fixed-link", &len);
-	if (fixed_link_prop && len == (5 * sizeof(__be32))) {
+	if (of_property_read_u32_array(np, "fixed-link", fixed_link_prop,
+				       ARRAY_SIZE(fixed_link_prop)) == 0) {
 		status.link = 1;
-		status.duplex = be32_to_cpu(fixed_link_prop[1]);
-		status.speed = be32_to_cpu(fixed_link_prop[2]);
-		status.pause = be32_to_cpu(fixed_link_prop[3]);
-		status.asym_pause = be32_to_cpu(fixed_link_prop[4]);
+		status.duplex = fixed_link_prop[1];
+		status.speed  = fixed_link_prop[2];
+		status.pause  = fixed_link_prop[3];
+		status.asym_pause = fixed_link_prop[4];
 		phy = fixed_phy_register(PHY_POLL, &status, -1, np);
 		return PTR_ERR_OR_ZERO(phy);
 	}