mfd: Add s2mps11 irq driver

This patch support irq handling driver for s2mps11.
As this patch use regmap_irq, s5m8767 and s5m8763 are modified with
regmap_irq.

Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index bad68f8..3c263a5 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -513,6 +513,7 @@
 	depends on I2C=y && GENERIC_HARDIRQS
 	select MFD_CORE
 	select REGMAP_I2C
+	select REGMAP_IRQ
 	help
 	 Support for the Samsung Electronics MFD series.
 	 This driver provides common support for accessing the device,