[IRDA]: Spelling fixes

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/irda/wrapper.c b/net/irda/wrapper.c
index e712867..c246983 100644
--- a/net/irda/wrapper.c
+++ b/net/irda/wrapper.c
@@ -238,7 +238,7 @@
 	skb_reserve(newskb, 1);
 
 	if(docopy) {
-		/* Copy data without CRC (lenght already checked) */
+		/* Copy data without CRC (length already checked) */
 		skb_copy_to_linear_data(newskb, rx_buff->data,
 					rx_buff->len - 2);
 		/* Deliver this skb */