net: phy: delay only if reset handler is registered

With commit e3a77218a2 the MII bus is only
reset if a reset handler is registered. If there is no reset handler there
is no need to wait for a device to come out of the reset.

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>

drivers/net/phy/phy.c

@@ -763,11 +763,13 @@ struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
 		phy_interface_t interface)
 {
 	/* Reset the bus */
-	if (bus->reset)
+	if (bus->reset) {
 		bus->reset(bus);
 
-	/* Wait 15ms to make sure the PHY has come out of hard reset */
-	udelay(15000);
+		/* Wait 15ms to make sure the PHY has come out of hard reset */
+		udelay(15000);
+	}
+
 	return get_phy_device_by_mask(bus, phy_mask, interface);
 }