core_ctrl: Move core control into kernel

Move core control from out-of-tree module into the kernel proper.

Core control monitors load on CPUs and controls how many CPUs are
available for the system to use at any point in time. This can help save
power. Core control can be configured through sysfs interface.

Change-Id: Ia78e701468ea3828195c2a15c9cf9fafd099804a
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>

init/Kconfig

@@ -1170,6 +1170,16 @@ config SCHED_HMP_CSTATE_AWARE
 	  with CPUs C-state. If this is enabled, scheduler places tasks
 	  onto the shallowest C-state CPU among the most power efficient CPUs.
 
+config SCHED_CORE_CTL
+	bool "QTI Core Control"
+	depends on SMP
+	help
+	  This options enables the core control functionality in
+	  the scheduler. Core control automatically offline and
+	  online cores based on cpu load and utilization.
+
+	  If unsure, say N here.
+
 config CHECKPOINT_RESTORE
 	bool "Checkpoint/restore support" if EXPERT
 	select PROC_CHILDREN

kernel/sched/Makefile

@@ -20,3 +20,4 @@ obj-$(CONFIG_SCHED_AUTOGROUP) += auto_group.o
 obj-$(CONFIG_SCHEDSTATS) += stats.o
 obj-$(CONFIG_SCHED_DEBUG) += debug.o
 obj-$(CONFIG_CGROUP_CPUACCT) += cpuacct.o
+obj-$(CONFIG_SCHED_CORE_CTL) += core_ctl.o