staging: iio: dds: ad9832: Fix kconfig description

The AD9832 driver doesn't support the AD9833 and AD9834

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/dds/Kconfig

@@ -11,11 +11,11 @@ config AD5930
 	  ad5930/ad5932, provides direct access via sysfs.
 
 config AD9832
-	tristate "Analog Devices ad9832/3/4/5 driver"
+	tristate "Analog Devices ad9832/5 driver"
 	depends on SPI
 	help
 	  Say yes here to build support for Analog Devices DDS chip
-	  ad9832/3/4/5, provides direct access via sysfs.
+	  ad9832 and ad9835, provides direct access via sysfs.
 
 config AD9850
 	tristate "Analog Devices ad9850/1 driver"