AT91: Remove fixed mapping for AT91RM9200 ethernet

The AT91RM9200 Ethernet controller still has a fixed IO mapping.
So:
* Remove the fixed IO mapping and AT91_VA_BASE_EMAC definition.
* Pass the physical base-address via platform-resources to the driver.
* Convert at91_ether.c driver to perform an ioremap().
* Ethernet PHY detection needs to be performed during the driver
initialization process, it can no longer be done first.

Signed-off-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/cadence/at91_ether.h b/drivers/net/ethernet/cadence/at91_ether.h
index 3725fbb0..0ef6328 100644
--- a/drivers/net/ethernet/cadence/at91_ether.h
+++ b/drivers/net/ethernet/cadence/at91_ether.h
@@ -88,6 +88,7 @@
 	struct macb_platform_data board_data;	/* board-specific
 						 * configuration (shared with
 						 * macb for common data */
+	void __iomem *emac_base;		/* base register address */
 	struct clk *ether_clk;			/* clock */
 
 	/* PHY */