mac80211: fix a harmless uninitialized variable warning

Signed-off-by: Felix Fietkau <[email protected]>

package/kernel/mac80211/patches/220-fq_disable_hack.patch

@@ -8,7 +8,7 @@ performance. Disable it until the cause has been found and fixed
  	lockdep_assert_held(&fq->lock);
  
 +	/* HACK: disable fq for now until TCP issues are fixed */
-+	return get_default_func(fq, tin, idx, skb);
++	return get_default_func(fq, tin, 0, skb);
 +
  	hash = skb_get_hash_perturb(skb, fq->perturbation);
  	idx = reciprocal_scale(hash, fq->flows_cnt);