vxlan: move to its own directory

vxlan.c has grown too long. This patch moves
it to its own directory. subsequent patches add new
functionality in new files.
Signed-off-by: Roopa Prabhu <roopa@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/Makefile

@@ -31,7 +31,7 @@ obj-$(CONFIG_TUN) += tun.o
 obj-$(CONFIG_TAP) += tap.o
 obj-$(CONFIG_VETH) += veth.o
 obj-$(CONFIG_VIRTIO_NET) += virtio_net.o
-obj-$(CONFIG_VXLAN) += vxlan.o
+obj-$(CONFIG_VXLAN) += vxlan/
 obj-$(CONFIG_GENEVE) += geneve.o
 obj-$(CONFIG_BAREUDP) += bareudp.o
 obj-$(CONFIG_GTP) += gtp.o

drivers/net/vxlan/Makefile

+#
+# Makefile for the vxlan driver
+#
+
+obj-$(CONFIG_VXLAN) += vxlan.o
+
+vxlan-objs := vxlan_core.o