netfilter: fix struct ip6t_frag field description

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

include/uapi/linux/netfilter_ipv6/ip6t_frag.h

@@ -4,9 +4,9 @@
 #include <linux/types.h>
 
 struct ip6t_frag {
-	__u32 ids[2];			/* Security Parameter Index */
+	__u32 ids[2];			/* Identification range */
 	__u32 hdrlen;			/* Header Length */
-	__u8  flags;			/*  */
+	__u8  flags;			/* Flags */
 	__u8  invflags;			/* Inverse flags */
 };