Add Apex PMIC config

Change-Id: I5f9e206b6e192258f90a5d61c5152a3a6fdc338d
diff --git a/defconfig b/defconfig
index 5a943db..d5fe12f 100644
--- a/defconfig
+++ b/defconfig
@@ -60,6 +60,7 @@
 CONFIG_DRM_PANEL_TIANMA_S6D6FP0A2=y
 CONFIG_STAGING_GASKET_FRAMEWORK=y
 CONFIG_STAGING_APEX_DRIVER=y
+CONFIG_REGULATOR_APEX_PMIC=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGETFS=y
 CONFIG_USB_FUNCTIONFS=y