trivial: fix where cgroup documentation is not correctly referred to
Thadeu Lima de Souza Cascardo authored

cgroup documentation was moved to Documentation/cgroups/. There are some
places that still refer to Documentation/controllers/,
Documentation/cgroups.txt and Documentation/cpusets.txt. Fix those.
Signed-off-by: default avatarThadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Reviewed-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
Acked-by: default avatarPaul Menage <menage@google.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
21acb9ca