net: move MII outside of NET_ETHERNET, fix kconfig warning

net: move MII outside of NET_ETHERNET, fix kconfig warning

We have USB, PCMCIA, and gigabit ethernet drivers that select
MII even though NET_ETHERNET is not enabled, so make MII not
be dependent on NET_ETHERNET.  It is still dependent on NET
and NETDEVICES.

Fixes kconfig unmet dependency warning (shortened, was very long string):

warning: (ARM_AT91_ETHER && NETDEVICES && NET_ETHERNET && ARM && ARCH_AT91RM9200 || ARM_KS8695_ETHER && NETDEVICES && NET_ETHERNET && ARM && ARCH_KS8695 || ... || IP1000 && NETDEVICES && NETDEV_1000 && PCI && EXPERIMENTAL || HAMACHI && NETDEVICES && NETDEV_1000 && PCI || R8169 && NETDEVICES && NETDEV_1000 && PCI || SIS190 && NETDEVICES && NETDEV_1000 && PCI || VIA_VELOCITY && NETDEVICES && NETDEV_1000 && PCI || ATL1 && NETDEVICES && NETDEV_1000 && PCI || ATL1E && NETDEVICES && NETDEV_1000 && PCI && EXPERIMENTAL || ATL1C && NETDEVICES && NETDEV_1000 && PCI && EXPERIMENTAL || JME && NETDEVICES && NETDEV_1000 && PCI || STMMAC_ETH && NETDEV_1000 && NETDEVICES && HAS_IOMEM || USB_PEGASUS && NETDEVICES && USB && NET || USB_RTL8150 && NETDEVICES && USB && NET && EXPERIMENTAL || USB_USBNET && NETDEVICES && USB && NET || PCMCIA_SMC91C92 && NETDEVICES && NET_PCMCIA && PCMCIA) selects MII which has unmet direct dependencies (NETDEVICES && NET_ETHERNET)

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Jeff Garzik <jgarzik@pobox.com> [2006-NOV-30]
Signed-off-by: David S. Miller <davem@davemloft.net>