power: regulator: palmas: Add regulator support

The driver provides regulator set/get voltage
enable/disable functions for palmas family of PMICs.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index 255eccf..461891c 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -133,3 +133,11 @@
 	regulators, one for each FET. The standard regulator interface is
 	supported, but it is only possible to turn the regulators on or off.
 	There is no voltage/current control.
+
+config DM_REGULATOR_PALMAS
+	bool "Enable driver for PALMAS PMIC regulators"
+       depends on PMIC_PALMAS
+	---help---
+	This enables implementation of driver-model regulator uclass
+	features for REGULATOR PALMAS and the family of PALMAS PMICs.
+	The driver implements get/set api for: value and enable.