mac80211_hwsim: Fix spelling mistake "Droping" -> "Dropping"

There is a spelling mistake in a comment, fix it.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20211026094000.209463-1-colin.i.king@gmail.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/mac80211_hwsim.c

@@ -1276,7 +1276,7 @@ static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
 		hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 	/* If the queue contains MAX_QUEUE skb's drop some */
 	if (skb_queue_len(&data->pending) >= MAX_QUEUE) {
-		/* Droping until WARN_QUEUE level */
+		/* Dropping until WARN_QUEUE level */
 		while (skb_queue_len(&data->pending) >= WARN_QUEUE) {
 			ieee80211_free_txskb(hw, skb_dequeue(&data->pending));
 			data->tx_dropped++;