power: regulator: s2mps11: add a regulator driver for s2mps11

exynos5422 has the s2mps11 PMIC.
s2mps11 pmic has the 10-BUCK and 38-LDO regulators.
Each IP and devices in exynos5422 can be controlled by each regulators.
This patch is support for s2mps11 regulator driver.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Anand Moon <linux.amoon@gmail.com>
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index 26fb936..5b4ac10 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -101,6 +101,14 @@
 	by the PMIC device. This driver is controlled by a device tree node
 	which includes voltage limits.
 
+config DM_REGULATOR_S2MPS11
+	bool "Enable driver for S2MPS11 regulator"
+	depends on DM_REGULATOR && PMIC_S2MPS11
+	---help---
+	This enables implementation of driver-model regulator uclass
+	features for REGULATOR S2MPS11.
+	The driver implements get/set api for: value and enable.
+
 config REGULATOR_S5M8767
 	bool "Enable support for S5M8767 regulator"
 	depends on DM_REGULATOR && PMIC_S5M8767