rt2x00: fixup fill_tx_status for nomatch case

Add bits rt2x00lib_fill_tx_status() when filling status in nomatch
case and hopefully do not break the function for existing cases.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>