phy: Temporary build fix after phylib changes.

Make PHYLIB boolean, because we reference phylib provided symbols now
from net/core/ethtool.c and therefore 'm' doesn't work.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/phy/Kconfig

@@ -9,7 +9,6 @@ menuconfig MDIO_DEVICE
 
 config MDIO_BUS
 	tristate
-	default m if PHYLIB=m
 	default MDIO_DEVICE
 	help
 	  This internal symbol is used for link time dependencies and it
@@ -171,7 +170,7 @@ config PHYLINK
 	  autonegotiation modes.
 
 menuconfig PHYLIB
-	tristate "PHY Device support and infrastructure"
+	bool "PHY Device support and infrastructure"
 	depends on NETDEVICES
 	select MDIO_DEVICE
 	help