net/at91_ether: use ethtool and mdio from macb

This rips out the at91_ether phy handling and ethtool stuff
and replace it with equivalent stuff from macb.

The only thing lost is the phy irq support from at91_ether,
but this can be added to macb and then benefit all users.

Signed-off-by: Joachim Eastwood <manabian@gmail.com>

drivers/net/ethernet/cadence/macb.h

@@ -555,17 +555,10 @@ struct macb {
 	phy_interface_t		phy_interface;
 
 	/* at91_private */
-	struct mii_if_info mii;			/* ethtool support */
 	struct macb_platform_data board_data;	/* board-specific
 						 * configuration (shared with
 						 * macb for common data */
 
-	/* PHY */
-	unsigned long phy_type;			/* type of PHY (PHY_ID) */
-	short phy_media;			/* media interface type */
-	unsigned short phy_address;		/* 5-bit MDI address of PHY (0..31) */
-	struct timer_list check_timer;		/* Poll link status */
-
 	/* Transmit */
 	struct sk_buff *skb;			/* holds skb until xmit interrupt completes */
 	dma_addr_t skb_physaddr;		/* phys addr from pci_map_single */