hwmon: pm8xxx_adc: Remove pm8921-adc

Switch clients to use pm8xxx-adc and remove pm8921-adc.
pm8xxx-adc supports PMIC HK/XOADC for 8960, 9x15, 8064
platforms.

Change-Id: Id27fa908cc097d52e6033c28ce243c6bcf64ed27
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
diff --git a/arch/arm/configs/msm8960_defconfig b/arch/arm/configs/msm8960_defconfig
index 5cf8b2d..e136a0a 100644
--- a/arch/arm/configs/msm8960_defconfig
+++ b/arch/arm/configs/msm8960_defconfig
@@ -269,7 +269,7 @@
 CONFIG_ISL9519_CHARGER=y
 CONFIG_PM8921_CHARGER=y
 CONFIG_PM8921_BMS=y
-CONFIG_SENSORS_PM8921_ADC=y
+CONFIG_SENSORS_PM8XXX_ADC=y
 CONFIG_THERMAL=y
 CONFIG_THERMAL_TSENS8960=y
 CONFIG_THERMAL_PM8XXX=y