iio: adc: Fix MAX9611 spacing

Between "config" and "MAX9611" there is a tab, replace it
with a space.
Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/Kconfig

@@ -553,7 +553,7 @@ config MAX1363
 	  To compile this driver as a module, choose M here: the module will be
 	  called max1363.
 
-config	MAX9611
+config MAX9611
 	tristate "Maxim max9611/max9612 ADC driver"
 	depends on I2C
 	help