MAINTAINERS: Add Chen Ridong as cpuset reviewer

Add Chen Ridong as a reviewer for the cpuset cgroup subsystem.

Signed-off-by: Waiman Long <[e-mail]>
Acked-by: Chen Ridong <[e-mail]>
Signed-off-by: Tejun Heo <[e-mail]>

MAINTAINERS

···
 
 CONTROL GROUP - CPUSET
 M:	Waiman Long <[e-mail]>
+R:	Chen Ridong <[e-mail]>
 L:	[e-mail]
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git