Add the still missing dependencies for triggered buffer support.
Fixes: 	95c12bba51c37 ("iio: accel: Add buffer mode for Sensortek STK8312")
Signed-off-by: Hartmut Knaack <knaack.h@gmx.de>
Reviewed-by: Tiberiu Breana <tiberiu.a.breana@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
 config STK8312
        tristate "Sensortek STK8312 3-Axis Accelerometer Driver"
        depends on I2C
+       select IIO_BUFFER
+       select IIO_TRIGGERED_BUFFER
        help
          Say yes here to get support for the Sensortek STK8312 3-axis
          accelerometer.