Merge branch 'geneve-lwt-efficiency'

Pravin B Shelar says:

====================
geneve: Use LWT more effectively.

Following patch series make use of geneve LWT code path for
geneve netdev type of device.
This allows us to simplify geneve module without changing any
functionality.

v2-v3:
Rebase against latest net-next.

v1-v2:
Fix warning reported by kbuild test robot.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>