i40iw: Change dup_ack_thresh to u8

Change dup_ack_thressh to u8 since it is a 3 bit field.

Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
1 file changed