power: regulator: lp873x: Add regulator support

The driver provides regulator set/get voltage
enable/disable functions for lp873x family of PMICs.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index 461891c..f870e8b 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -141,3 +141,11 @@
 	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.
+
+config DM_REGULATOR_LP873X
+	bool "Enable driver for LP873X PMIC regulators"
+        depends on PMIC_LP873X
+	---help---
+	This enables implementation of driver-model regulator uclass
+	features for REGULATOR LP873X and the family of LP873X PMICs.
+	The driver implements get/set api for: value and enable.