geneve: Consolidate Geneve functionality in single module.

geneve_core module handles send and receive functionality.
This way OVS could use the Geneve API. Now with use of
tunnel meatadata mode OVS can directly use Geneve netdevice.
So there is no need for separate module for Geneve. Following
patch consolidates Geneve protocol processing in single module.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Reviewed-by: Jesse Gross <jesse@nicira.com>
Acked-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/Kconfig

@@ -180,8 +180,8 @@ config VXLAN
 	  will be called vxlan.
 
 config GENEVE
-       tristate "Generic Network Virtualization Encapsulation netdev"
-       depends on INET && GENEVE_CORE
+       tristate "Generic Network Virtualization Encapsulation"
+       depends on INET && NET_UDP_TUNNEL
        select NET_IP_TUNNEL
        ---help---
 	  This allows one to create geneve virtual interfaces that provide