In i40iw_cq_poll_completion, we always move the tail. So there is
no reason to check for overflow everytime we move the head.
Signed-off-by: NMustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: NShiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>