mlx4: Move the Mellanox driver

Moves the Mellanox driver into drivers/net/ethernet/mellanox/ and
make the necessary Kconfig and Makefile changes.

CC: Roland Dreier <roland@kernel.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/mellanox/Kconfig b/drivers/net/ethernet/mellanox/Kconfig
new file mode 100644
index 0000000..e0694912
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/Kconfig
@@ -0,0 +1,22 @@
+#
+# Mellanox driver configuration
+#
+
+config NET_VENDOR_MELLANOX
+	bool "Mellanox devices"
+	depends on PCI && INET
+	---help---
+	  If you have a network (Ethernet) card belonging to this class, say Y
+	  and read the Ethernet-HOWTO, available from
+	  <http://www.tldp.org/docs.html#howto>.
+
+	  Note that the answer to this question doesn't directly affect the
+	  kernel: saying N will just cause the configurator to skip all
+	  the questions about Mellanox cards. If you say Y, you will be asked
+	  for your specific card in the following questions.
+
+if NET_VENDOR_MELLANOX
+
+source "drivers/net/ethernet/mellanox/mlx4/Kconfig"
+
+endif # NET_VENDOR_MELLANOX