r6040: implement phylib

This patch adds support for using phylib and adds the required mdiobus driver
stubs. This allows for less code to be present in the driver and removes
the PHY status specific timer which is now handled by phylib directly.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/Kconfig

@@ -1659,6 +1659,7 @@ config R6040
 	depends on NET_PCI && PCI
 	select CRC32
 	select MII
+	select PHYLIB
 	help
 	  This is a driver for the R6040 Fast Ethernet MACs found in the
 	  the RDC R-321x System-on-chips.