Merge branch 'use-xdp-helpers'

Matteo Croce says:

====================
net: use XDP helpers

The commit 43b5169d ("net, xdp: Introduce xdp_init_buff utility
routine") and commit be9df4af ("net, xdp: Introduce xdp_prepare_buff
utility routine") introduces two useful helpers to populate xdp_buff.
Use it in drivers which still open codes that routines.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>