net: openvswitch: remove unneeded semicolon

Eliminate the following coccicheck warning:
./net/openvswitch/flow.c:379:2-3: Unneeded semicolon
Reported-by: NAbaci Robot <abaci@linux.alibaba.com>
Signed-off-by: NYang Li <yang.lee@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220227132208.24658-1-yang.lee@linux.alibaba.comSigned-off-by: NJakub Kicinski <kuba@kernel.org>

net/openvswitch/flow.c

@@ -376,7 +376,7 @@ static void get_ipv6_ext_hdrs(struct sk_buff *skb, struct ipv6hdr *nh,
 			break;
 		next_type = hp->nexthdr;
 		start += ipv6_optlen(hp);
-	};
+	}
 }
 
 static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)