[ Upstream commit f7fc6bc4 ]

The file ila.h used for lightweight tunnels is being used by iproute2
but is not exported yet.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>