iwlegacy: 4965-rs: remove null check on sta in il4965_rs_tx_status

the null check on sta in il4965_rs_tx_status is not necessary

Signed-off-by: Greg Dietsche <Gregory.Dietsche@cuw.edu>
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
1 file changed