[NET]: Let USB_USBNET always select MII.

All this USB_USBNET_MII trickery is simply not worth it considering how
few code it saves.

As a side effect, this also fixes the following compile error reported
by Toralf F�rster:

<-- snip -->

...
LD .tmp_vmlinux1
drivers/built-in.o: In function `usbnet_set_settings':
(.text+0xf1876): undefined reference to `mii_ethtool_sset'
drivers/built-in.o: In function `usbnet_get_settings':
(.text+0xf1836): undefined reference to `mii_ethtool_gset'
drivers/built-in.o: In function `usbnet_get_link':
(.text+0xf18d6): undefined reference to `mii_link_ok'
drivers/built-in.o: In function `usbnet_nway_reset':
(.text+0xf18f6): undefined reference to `mii_nway_restart'
make: *** [.tmp_vmlinux1] Error 1

<-- snip -->

Signed-off-by: Adrian Bunk <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/usb/Kconfig

···
 	  To compile this driver as a module, choose M here: the
 	  module will be called rtl8150.
 
-config USB_USBNET_MII
-	tristate
-	default n
-
 config USB_USBNET
 	tristate "Multi-purpose USB Networking Framework"
-	select MII if USB_USBNET_MII != n
+	select MII
 	---help---
 	  This driver supports several kinds of network links over USB,
 	  with "minidrivers" built around a common network driver core
···
 	tristate "ASIX AX88xxx Based USB 2.0 Ethernet Adapters"
 	depends on USB_USBNET && NET_ETHERNET
 	select CRC32
-	select USB_USBNET_MII
 	default y
 	help
 	  This option adds support for ASIX AX88xxx based USB 2.0
···
 	tristate "Davicom DM9601 based USB 1.1 10/100 ethernet devices"
 	depends on USB_USBNET
 	select CRC32
-	select USB_USBNET_MII
 	help
 	  This option adds support for Davicom DM9601 based USB 1.1
 	  10/100 Ethernet adapters.
···
 config USB_NET_MCS7830
 	tristate "MosChip MCS7830 based Ethernet adapters"
 	depends on USB_USBNET
-	select USB_USBNET_MII
 	help
 	  Choose this option if you're using a 10/100 Ethernet USB2
 	  adapter based on the MosChip 7830 controller. This includes

drivers/net/usb/usbnet.c

···
  * they'll probably want to use this base set.
  */
 
-#if defined(CONFIG_MII) || defined(CONFIG_MII_MODULE)
-#define HAVE_MII
-
 int usbnet_get_settings (struct net_device *net, struct ethtool_cmd *cmd)
 {
 	struct usbnet *dev = netdev_priv(net);
···
 }
 EXPORT_SYMBOL_GPL(usbnet_nway_reset);
 
-#endif	/* HAVE_MII */
-
 void usbnet_get_drvinfo (struct net_device *net, struct ethtool_drvinfo *info)
 {
 	struct usbnet *dev = netdev_priv(net);
···
 
 /* drivers may override default ethtool_ops in their bind() routine */
 static struct ethtool_ops usbnet_ethtool_ops = {
-#ifdef	HAVE_MII
 	.get_settings		= usbnet_get_settings,
 	.set_settings		= usbnet_set_settings,
 	.get_link		= usbnet_get_link,
 	.nway_reset		= usbnet_nway_reset,
-#endif
 	.get_drvinfo		= usbnet_get_drvinfo,
 	.get_msglevel		= usbnet_get_msglevel,
 	.set_msglevel		= usbnet_set_msglevel,