Merge branch 'enetc-cleanups'

Vladimir Oltean says:

====================
Refactoring/cleanup for NXP ENETC

This series performs the following:
- makes the API for Control Buffer Descriptor Rings in enetc_cbdr.c a
  bit more tightly knit.
- moves more logic into enetc_rxbd_next to make the callers simpler
- moves more logic into enetc_refill_rx_ring to make the callers simpler
- removes forward declarations
- simplifies the probe path to unify probing for used and unused PFs.

Nothing radical.
====================

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