ARM: multi_v7_defconfig: Enable RPi voltage sensor

The patch enables the hwmon driver for the Raspberry Pi.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>

arch/arm/configs/multi_v7_defconfig

@@ -478,6 +478,7 @@ CONFIG_SENSORS_LM90=y
 CONFIG_SENSORS_LM95245=y
 CONFIG_SENSORS_NTC_THERMISTOR=m
 CONFIG_SENSORS_PWM_FAN=m
+CONFIG_SENSORS_RASPBERRYPI_HWMON=m
 CONFIG_SENSORS_INA2XX=m
 CONFIG_CPU_THERMAL=y
 CONFIG_BCM2835_THERMAL=m