backports: replace netdev ops patch with spatch

backports: replace netdev ops patch with spatch

There's no need to carry a small netdev ops patch for
each driver any more now, we can just write a small
semantic patch. Only the ndo_ioctl() part is easier
to keep as a separate patch.

As some stupid drivers seem to set their ops to NULL
just before freeing the netdev anyway, the attach
function must gracefully handle that (but not doesn't
really need to do anything.)

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>