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>
diff --git a/drivers/net/wireless/rt2x00/rt2x00mac.c b/drivers/net/wireless/rt2x00/rt2x00mac.c
index c4c06b4..475a3ed 100644
--- a/drivers/net/wireless/rt2x00/rt2x00mac.c
+++ b/drivers/net/wireless/rt2x00/rt2x00mac.c
@@ -73,7 +73,8 @@
 	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