phy: Add reset callback for not generic phy

Add a dummy function for phy_reset in case the CONFIG_GENERIC_PHY
is disabled.

Signed-off-by: Randy Li <ayaka@soulik.info>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

include/linux/phy/phy.h

@@ -253,6 +253,13 @@ static inline int phy_set_mode(struct phy *phy, enum phy_mode mode)
 	return -ENOSYS;
 }
 
+static inline int phy_reset(struct phy *phy)
+{
+	if (!phy)
+		return 0;
+	return -ENOSYS;
+}
+
 static inline int phy_get_bus_width(struct phy *phy)
 {
 	return -ENOSYS;