mfd: Add S5M series configuration

This patch add Samsung S5M Kconfig and Makefile entry.

Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 7f389a8..09fc6c0 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -106,3 +106,4 @@
 obj-$(CONFIG_TPS65911_COMPARATOR)	+= tps65911-comparator.o
 obj-$(CONFIG_MFD_AAT2870_CORE)	+= aat2870-core.o
 obj-$(CONFIG_MFD_INTEL_MSIC)	+= intel_msic.o
+obj-$(CONFIG_MFD_S5M_CORE)	+= s5m-core.o s5m-irq.o