netfilter: nf_tables: Eliminate duplicated code in nf_tables_table_enable()

If something fails in nf_tables_table_enable(), it unregisters the
chains. But the rollback code is the same as nf_tables_table_disable()
almostly, except there is one counter check.  Now create one wrapper
function to eliminate the duplicated codes.

Signed-off-by: Feng <fgao@ikuai8.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

path: root/net/irda/irlan/Kconfig

config IRLAN
	tristate "IrLAN protocol"
	depends on IRDA
	help
	  Say Y here if you want to build support for the IrLAN protocol.
	  To compile it as a module, choose M here: the module will be called
	  irlan.  IrLAN emulates an Ethernet and makes it possible to put up
	  a wireless LAN using infrared beams.

	  The IrLAN protocol can be used to talk with infrared access points
	  like the HP NetbeamIR, or the ESI JetEye NET.  You can also connect
	  to another Linux machine running the IrLAN protocol for ad-hoc
	  networking!