lwtunnel: export linux/lwtunnel.h to userspace

Note also that include/linux/lwtunnel.h is not needed.

CC: Thomas Graf <tgraf@suug.ch>
CC: Roopa Prabhu <roopa@cumulusnetworks.com>
Fixes: 499a2425 ("lwtunnel: infrastructure for handling light weight tunnels like mpls")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/lwtunnel.h

-#ifndef _LINUX_LWTUNNEL_H_
-#define _LINUX_LWTUNNEL_H_
-
-#include <uapi/linux/lwtunnel.h>
-
-#endif /* _LINUX_LWTUNNEL_H_ */

include/uapi/linux/Kbuild

@@ -243,6 +243,7 @@ header-y += limits.h
 header-y += llc.h
 header-y += loop.h
 header-y += lp.h
+header-y += lwtunnel.h
 header-y += magic.h
 header-y += major.h
 header-y += map_to_7segment.h