rt2x00: remove skb->do_not_encrypt usage

Johannes is trying to get rid of the master netdev and in the process will
remove skb->do_not_encrypt field. This removes the do_not_encrypt
usage from rt2x00 to make the change easier.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2x00crypto.c

@@ -53,8 +53,7 @@ void rt2x00crypto_create_tx_descriptor(struct queue_entry *entry,
 	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
 	struct ieee80211_key_conf *hw_key = tx_info->control.hw_key;
 
-	if (!test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags) ||
-	    !hw_key || entry->skb->do_not_encrypt)
+	if (!test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags) || !hw_key)
 		return;
 
 	__set_bit(ENTRY_TXD_ENCRYPT, &txdesc->flags);
@@ -82,8 +81,7 @@ unsigned int rt2x00crypto_tx_overhead(struct rt2x00_dev *rt2x00dev,
 	struct ieee80211_key_conf *key = tx_info->control.hw_key;
 	unsigned int overhead = 0;
 
-	if (!test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags) ||
-	    !key || skb->do_not_encrypt)
+	if (!test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags) || !key)
 		return overhead;
 
 	/*

drivers/net/wireless/rt2x00/rt2x00mac.c

@@ -73,7 +73,8 @@ static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev,
 	else
 		rts_info->flags &= ~IEEE80211_TX_CTL_NO_ACK;
 
-	skb->do_not_encrypt = 1;
+	/* Disable hardware encryption */
+	rts_info->control.hw_key = NULL;
 
 	/*
 	 * RTS/CTS frame should use the length of the frame plus any