rt2x00: remove duplicate word and fix typo in comment

remove duplicate word 'we' in comment
change 'then' to 'than' in comment
Signed-off-by: wengjianfeng <wengjianfeng@yulong.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210204005119.18060-1-samirweng1979@163.com

drivers/net/wireless/ralink/rt2x00/rt2x00crypto.c

@@ -179,7 +179,7 @@ void rt2x00crypto_rx_insert_iv(struct sk_buff *skb,
 	 * Make room for new data. There are 2 possibilities
 	 * either the alignment is already present between
 	 * the 802.11 header and payload. In that case we
-	 * we have to move the header less then the iv_len
+	 * have to move the header less than the iv_len
 	 * since we can use the already available l2pad bytes
 	 * for the iv data.
 	 * When the alignment must be added manually we must