cgroups.cfg: Add missing controllers

The the new controllers were added several kernels back and are
required for additional functionality.  These are applicable to the
4.9 kernel and newer.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>

features/cgroups/cgroups.cfg

@@ -7,6 +7,9 @@ CONFIG_CGROUP_DEVICE=y
 CONFIG_CPUSETS=y
 CONFIG_PROC_PID_CPUSET=y
 CONFIG_CGROUP_CPUACCT=y
+CONFIG_CGROUP_PIDS=y
+CONFIG_CGROUP_NET_PRIO=y
+CONFIG_CGROUP_PERF=y
 
 CONFIG_MEMCG=y
 CONFIG_MEMCG_SWAP=y