net: macb: shrink macb_platform_data structure

This structure was used intensively for machine specific values
when DT was not used. Since the removal of AVR32 from the kernel,
this structure is only used for passing clocks from PCI macb wrapper, all
other fields being 0.
All other known platforms use DT.

Remove the leftovers but make sure that PCI macb still works as
expected by using default values:
- phydev->irq is set to PHY_POLL by mdiobus_alloc()
- mii_bus->phy_mask is cleared while allocating it
- bp->phy_interface is set to PHY_INTERFACE_MODE_MII if mode not found
in DT.

This simplifies driver probe path and particularly phy handling.

Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/platform_data/macb.h

@@ -12,19 +12,10 @@
 
 /**
  * struct macb_platform_data - platform data for MACB Ethernet
- * @phy_mask:		phy mask passed when register the MDIO bus
- *			within the driver
- * @phy_irq_pin:	PHY IRQ
- * @is_rmii:		using RMII interface?
- * @rev_eth_addr:	reverse Ethernet address byte order
  * @pclk:		platform clock
  * @hclk:		AHB clock
  */
 struct macb_platform_data {
-	u32		phy_mask;
-	int		phy_irq_pin;
-	u8		is_rmii;
-	u8		rev_eth_addr;
 	struct clk	*pclk;
 	struct clk	*hclk;
 };