Merge branch 'ila-Cleanup'

Tom Herbert says:

====================
ila: Cleanup

Perform some cleanup in ILA code. This includes:

- Fix rhashtable walk for cases where nl dumps are done with muliple
  function calls. Add a skip index to skip over entries in
  a node that have been previously visitied. Call rhashtable_walk_peek
  to avoid dropping items between calls to ila_nl_dump.
- Call alloc_bucket_spinlocks to create bucket locks.
- Split out module initialization and netlink definitions into
  separate files.
- Add ILA_CMD_FLUSH netlink command to clear the ILA translation table.
====================

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