power: regulator: add regulator support for CPCAP PMIC

The driver provides regulator set/get voltage and enable/disable functions
for CPCAP PMIC.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index bab6831..bec2d2d 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -493,3 +493,12 @@
 	  Enable this option to support controlling the VBUS supply in
 	  the USB PHY peripheral of the Renesas RZ/G2L SoC. This option
 	  is required in order to use the USB OTG port.
+
+config DM_REGULATOR_CPCAP
+	bool "Enable driver for CPCAP PMIC regulators"
+	depends on DM_REGULATOR && DM_PMIC_CPCAP
+	---help---
+	Enable implementation of driver-model regulator uclass features for
+	REGULATOR CPCAP. The driver supports both DC-to-DC Step-Down Switching
+	(SW) Regulators and Low-Dropout Linear (LDO) Regulators	found in CPCAP
+	PMIC and implements get/set api for voltage and state.