[NET]: cleanup extra semicolons

Spring cleaning time...

There seems to be a lot of places in the network code that have
extra bogus semicolons after conditionals.  Most commonly is a
bogus semicolon after: switch() { }

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 4a355fe..403eee6 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -723,7 +723,7 @@
 				       cmsg->cmsg_type);
 			err = -EINVAL;
 			break;
-		};
+		}
 	}
 
 exit_f: