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/Makefile b/drivers/power/regulator/Makefile
index e9ae22e..c979b51 100644
--- a/drivers/power/regulator/Makefile
+++ b/drivers/power/regulator/Makefile
@@ -16,3 +16,4 @@
 obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
 obj-$(CONFIG_DM_REGULATOR_SANDBOX) += sandbox.o
 obj-$(CONFIG_REGULATOR_TPS65090) += tps65090_regulator.o
+obj-$(CONFIG_$(SPL_)DM_REGULATOR_PALMAS) += palmas_regulator.o