6lowpan: Fix some typos in nhc_udp.c

s/Orignal/Original/
s/infered/inferred/
Reported-by: NHulk Robot <hulkci@huawei.com>
Signed-off-by: NWang Hai <wanghai38@huawei.com>
Acked-by: NRandy Dunlap <rdunlap@infradead.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/6lowpan/nhc_udp.c

@@ -5,7 +5,7 @@
  *	Authors:
  *	Alexander Aring	<aar@pengutronix.de>
  *
- *	Orignal written by:
+ *	Original written by:
  *	Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
  *	Jon Smirl <jonsmirl@gmail.com>
  */
@@ -82,7 +82,7 @@ static int udp_uncompress(struct sk_buff *skb, size_t needed)
 	if (fail)
 		return -EINVAL;
 
-	/* UDP length needs to be infered from the lower layers
+	/* UDP length needs to be inferred from the lower layers
 	 * here, we obtain the hint from the remaining size of the
 	 * frame
 	 */