netfilter: nf_tables: improve UAPI kernel-doc comments

In include/uapi/linux/netfilter/nf_tables.h,
correct the kernel-doc comments for mistyped enum names and enum values to
avoid these kernel-doc warnings and improve the documentation:

nf_tables.h:896: warning: Enum value 'NFT_EXTHDR_OP_TCPOPT' not described
in enum 'nft_exthdr_op'
nf_tables.h:896: warning: Excess enum value 'NFT_EXTHDR_OP_TCP' description
in 'nft_exthdr_op'

nf_tables.h:1210: warning: expecting prototype for enum
nft_flow_attributes. Prototype was for enum nft_offload_attributes instead

nf_tables.h:1428: warning: expecting prototype for enum nft_reject_code.
Prototype was for enum nft_reject_inet_code instead

(add beginning '@' to each enum value description:)
nf_tables.h:1493: warning: Enum value 'NFTA_TPROXY_FAMILY' not described
in enum 'nft_tproxy_attributes'
nf_tables.h:1493: warning: Enum value 'NFTA_TPROXY_REG_ADDR' not described
in enum 'nft_tproxy_attributes'
nf_tables.h:1493: warning: Enum value 'NFTA_TPROXY_REG_PORT' not described
in enum 'nft_tproxy_attributes'

nf_tables.h:1796: warning: expecting prototype for enum
nft_device_attributes. Prototype was for enum
nft_devices_attributes instead

Signed-off-by: Randy Dunlap <[e-mail]>
Signed-off-by: Florian Westphal <[e-mail]>
Signed-off-by: Pablo Neira Ayuso <[e-mail]>

include/uapi/linux/netfilter/nf_tables.h

···
  * enum nft_exthdr_op - nf_tables match options
  *
  * @NFT_EXTHDR_OP_IPV6: match against ipv6 extension headers
- * @NFT_EXTHDR_OP_TCP: match against tcp options
+ * @NFT_EXTHDR_OP_TCPOPT: match against tcp options
  * @NFT_EXTHDR_OP_IPV4: match against ipv4 options
  * @NFT_EXTHDR_OP_SCTP: match against sctp chunks
  * @NFT_EXTHDR_OP_DCCP: match against dccp otions
···
 #define NFTA_CT_MAX		(__NFTA_CT_MAX - 1)
 
 /**
- * enum nft_flow_attributes - ct offload expression attributes
+ * enum nft_offload_attributes - ct offload expression attributes
  * @NFTA_FLOW_TABLE_NAME: flow table name (NLA_STRING)
  */
 enum nft_offload_attributes {
···
 };
 
 /**
- * enum nft_reject_code - Generic reject codes for IPv4/IPv6
+ * enum nft_reject_inet_code - Generic reject codes for IPv4/IPv6
  *
  * @NFT_REJECT_ICMPX_NO_ROUTE: no route to host / network unreachable
  * @NFT_REJECT_ICMPX_PORT_UNREACH: port unreachable
···
 /**
  * enum nft_tproxy_attributes - nf_tables tproxy expression netlink attributes
  *
- * NFTA_TPROXY_FAMILY: Target address family (NLA_U32: nft_registers)
- * NFTA_TPROXY_REG_ADDR: Target address register (NLA_U32: nft_registers)
- * NFTA_TPROXY_REG_PORT: Target port register (NLA_U32: nft_registers)
+ * @NFTA_TPROXY_FAMILY: Target address family (NLA_U32: nft_registers)
+ * @NFTA_TPROXY_REG_ADDR: Target address register (NLA_U32: nft_registers)
+ * @NFTA_TPROXY_REG_PORT: Target port register (NLA_U32: nft_registers)
  */
 enum nft_tproxy_attributes {
 	NFTA_TPROXY_UNSPEC,
···
 #define NFTA_SYNPROXY_MAX (__NFTA_SYNPROXY_MAX - 1)
 
 /**
- * enum nft_device_attributes - nf_tables device netlink attributes
+ * enum nft_devices_attributes - nf_tables device netlink attributes
  *
  * @NFTA_DEVICE_NAME: name of this device (NLA_STRING)
  * @NFTA_DEVICE_PREFIX: device name prefix, a simple wildcard (NLA_STRING)