net: nixge: Add support for 64-bit platforms

Add support for 64-bit platforms to driver.

The hardware only supports 32-bit register accesses
so the accesses need to be split up into two writes
when setting the current and tail descriptor values.
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/ni/Kconfig

@@ -18,8 +18,9 @@ if NET_VENDOR_NI
 
 config NI_XGE_MANAGEMENT_ENET
 	tristate "National Instruments XGE management enet support"
-	depends on ARCH_ZYNQ
+	depends on HAS_IOMEM && HAS_DMA
 	select PHYLIB
+	select OF_MDIO
 	help
 	  Simple LAN device for debug or management purposes. Can
 	  support either 10G or 1G PHYs via SFP+ ports.