sched: enable CONFIG_FAIR_GROUP_SCHED=y by default

enable CONFIG_FAIR_GROUP_SCHED=y by default.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: NThomas Gleixner <tglx@linutronix.de>

init/Kconfig

@@ -283,7 +283,7 @@ config CPUSETS
 
 config FAIR_GROUP_SCHED
 	bool "Fair group cpu scheduler"
-	default n
+	default y
 	depends on EXPERIMENTAL
 	help
 	  This feature lets cpu scheduler recognize task groups and control cpu