netfilter: cleanup struct nft_table

Add comments for nlpid, family, udlen and udata in struct nft_table, and
afinfo is no longer a member of struct nft_table, so remove the comment
for it.
Signed-off-by: George Guo <guodongtai@kylinos.cn>
Signed-off-by: Florian Westphal <fw@strlen.de>

include/net/netfilter/nf_tables.h

@@ -1198,10 +1198,13 @@ static inline void nft_use_inc_restore(u32 *use)
  *	@hgenerator: handle generator state
  *	@handle: table handle
  *	@use: number of chain references to this table
+ *	@family:address family
  *	@flags: table flag (see enum nft_table_flags)
  *	@genmask: generation mask
- *	@afinfo: address family info
+ *	@nlpid: netlink port ID
  *	@name: name of the table
+ *	@udlen: length of the user data
+ *	@udata: user data
  *	@validate_state: internal, set when transaction adds jumps
  */
 struct nft_table {