defconfig: turn on SCHED_MC for some MSM targets

Currently CPUs that have entered nohz idle mode are not being woken
up to perform load balancing. Turning on SCHED_MC will fix that, and
will also cause CPUs to show up at the correct level of scheduling
domain (MC).

SCHED_MC would normally also cause SD_SHARE_PACKAGE_RESOURCES to be
turned on at the MC level as well, causing a task to be migrated to
an idle CPU when the task is woken up. Previous modifications to
SD_SHARE_PACKAGE_RESOURCES however have restricted its effect
to tasks that have the PF_WAKE_ON_IDLE flag set.

Certain target configurations (msm7627a*, msm8660*) are being left
out until they are verified with SCHED_MC.

Change-Id: I55652d8485d553c290c4423959dcce5f04576a86
Signed-off-by: Steve Muckle <smuckle@codeaurora.org>
diff --git a/arch/arm/configs/msm8974_defconfig b/arch/arm/configs/msm8974_defconfig
index ade2e66..37538e3 100644
--- a/arch/arm/configs/msm8974_defconfig
+++ b/arch/arm/configs/msm8974_defconfig
@@ -79,6 +79,7 @@
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_SMP=y
 # CONFIG_SMP_ON_UP is not set
+CONFIG_SCHED_MC=y
 CONFIG_ARM_ARCH_TIMER=y
 CONFIG_PREEMPT=y
 CONFIG_AEABI=y