phy: miphy365x: fix sparse warnings

Add missing 'static' modifier so sparse
won't complain anymore.

Signed-off-by: Felipe Balbi <[e-mail]>
Acked-by: Maxime Coquelin <[e-mail]>
Signed-off-by: Kishon Vijay Abraham I <[e-mail]>

drivers/phy/phy-miphy365x.c

···
 	return ret;
 }
 
-int miphy365x_get_addr(struct device *dev, struct miphy365x_phy *miphy_phy,
-		       int index)
+static int miphy365x_get_addr(struct device *dev,
+		struct miphy365x_phy *miphy_phy, int index)
 {
 	struct device_node *phynode = miphy_phy->phy->dev.of_node;
 	const char *name;