Add missing documentation of sysfs ABI for "isolated". It was added by
commit 59f30abe("show isolated cpus in sysfs"). However, there is
no documentation for these interface.
Signed-off-by: Kohei Tarumizu <tarumizu.kohei@fujitsu.com>
Link: https://lore.kernel.org/r/20211201115957.254224-3-tarumizu.kohei@fujitsu.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>