hwmon: pm8xxx-adc: Add PM8018 ADC Driver

PM8921 and PM8018 have a common ADC module. Difference's
are in the channel supported on individual PMIC's and
in the MPP mapping to the ADC device.
MPP configuration on PM8018 is not required. The MPP
is directly connected to the AMUX pre-mux channel.

Change-Id: I9aed3366f20e3985962119274d8b2865b7054a79
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index f9d671e..f3cd0ad 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -797,6 +797,15 @@
 	  The driver supports reading the HKADC, XOADC and support to set and receive
 	  temperature threshold notifications using the Battery temperature module.
 
+config SENSORS_PM8XXX_ADC
+	tristate "Support for Qualcomm PM8XXX ADC"
+	depends on MFD_PM8018_CORE
+	help
+	  This is the ADC arbiter driver for Qualcomm PM8XXX Chip.
+
+	  The driver supports reading the HKADC, XOADC and support to set and receive
+	  temperature threshold notifications using the Battery temperature module.
+
 config SENSORS_PC87360
 	tristate "National Semiconductor PC87360 family"
 	select HWMON_VID