various: Fix spelling of "registered" in comments.

Some comments misspell "registered"; this fixes them. No code changes.

Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index f8eda02..b2056e6 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -369,7 +369,7 @@
  *
  * If the rx_handler consider the skb should be ignored, it should return
  * RX_HANDLER_EXACT. The skb will only be delivered to protocol handlers that
- * are registred on exact device (ptype->dev == skb->dev).
+ * are registered on exact device (ptype->dev == skb->dev).
  *
  * If the rx_handler didn't changed skb->dev, but want the skb to be normally
  * delivered, it should return RX_HANDLER_PASS.