net: Remove unnecessary semicolons after switch statements

Also added an explicit break; to avoid
a fallthrough in net/ipv4/tcp_input.c

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index e82162c..3e6dafc 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -3845,12 +3845,13 @@
 					/* 16-bit multiple */
 					opt_rx->cookie_plus = opsize;
 					*hvpp = ptr;
+					break;
 				default:
 					/* ignore option */
 					break;
-				};
+				}
 				break;
-			};
+			}
 
 			ptr += opsize-2;
 			length -= opsize;