ARM: exynos_defconfig: Enable SCHED_MC and ENERGY_MODEL

The Energy Model (EM) is needed to run Energy Aware Scheduler (EAS).
Enable ENERGY_MODEL to make that happen. This will increase energy
efficiency of the big.LITTLE platforms (e.g. Exynos5422) by smarter
decisions in scheduling tasks in non-heavy workloads.

Add SCHED_MC in order to create another level in scheduling domains: 'MC'.
This improves scheduler's decisions on platforms with CPU clusters, such
as big.LITTLE.
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

arch/arm/configs/exynos_defconfig

@@ -8,6 +8,7 @@ CONFIG_PERF_EVENTS=y
 CONFIG_ARCH_EXYNOS=y
 CONFIG_CPU_ICACHE_MISMATCH_WORKAROUND=y
 CONFIG_SMP=y
+CONFIG_SCHED_MC=y
 CONFIG_BIG_LITTLE=y
 CONFIG_NR_CPUS=8
 CONFIG_HIGHMEM=y
@@ -17,6 +18,7 @@ CONFIG_ZBOOT_ROM_BSS=0x0
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
 CONFIG_CMDLINE="root=/dev/ram0 rw ramdisk=8192 initrd=0x41000000,8M console=ttySAC1,115200 init=/linuxrc mem=256M"
+CONFIG_ENERGY_MODEL=y
 CONFIG_CPU_FREQ=y
 CONFIG_CPU_FREQ_STAT=y
 CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y