[NIU]: Add Sun Neptune ethernet driver.

With cleanup suggestions and bugs spotted by Stephen Hemminger,
Ingo Oeser, Matheos Worku, and Oliver Hartkopp.
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/Kconfig

@@ -2594,6 +2594,13 @@ config NETXEN_NIC
 	help
 	  This enables the support for NetXen's Gigabit Ethernet card.
 
+config NIU
+	tristate "Sun Neptune 10Gbit Ethernet support"
+	depends on PCI
+	help
+	  This enables support for cards based upon Sun's
+	  Neptune chipset.
+
 config PASEMI_MAC
 	tristate "PA Semi 1/10Gbit MAC"
 	depends on PPC64 && PCI

drivers/net/Makefile

@@ -241,3 +241,4 @@ obj-$(CONFIG_NETCONSOLE) += netconsole.o
 obj-$(CONFIG_FS_ENET) += fs_enet/
 
 obj-$(CONFIG_NETXEN_NIC) += netxen/
+obj-$(CONFIG_NIU) += niu.o