iio: adc: Relocate Capacitance to Digital Converters (CDC) into own subdir

No functional changes.
Fix Kconfig description.

Signed-off-by: Michael Hennerich <[e-mail]>
Acked-by: Jonathan Cameron <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/iio/Kconfig

···
 source "drivers/staging/iio/accel/Kconfig"
 source "drivers/staging/iio/adc/Kconfig"
 source "drivers/staging/iio/addac/Kconfig"
+source "drivers/staging/iio/cdc/Kconfig"
 source "drivers/staging/iio/dac/Kconfig"
 source "drivers/staging/iio/dds/Kconfig"
 source "drivers/staging/iio/gyro/Kconfig"

drivers/staging/iio/Makefile

···
 obj-y += accel/
 obj-y += adc/
 obj-y += addac/
+obj-y += cdc/
 obj-y += dac/
 obj-y += dds/
 obj-y += gyro/

drivers/staging/iio/adc/Kconfig

···
 #
 menu "Analog to digital converters"
 
-config AD7150
-	tristate "Analog Devices ad7150/1/6 capacitive sensor driver"
-	depends on I2C
-	help
-	  Say yes here to build support for Analog Devices capacitive sensors.
-	  (ad7150, ad7151, ad7156) Provides direct access via sysfs.
-
-config AD7152
-	tristate "Analog Devices ad7152/3 capacitive sensor driver"
-	depends on I2C
-	help
-	  Say yes here to build support for Analog Devices capacitive sensors.
-	  (ad7152, ad7153) Provides direct access via sysfs.
-
 config AD7291
 	tristate "Analog Devices AD7291 ADC driver"
 	depends on I2C
···
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called AD7793.
-
-config AD7746
-	tristate "Analog Devices AD7745, AD7746 AD7747 capacitive sensor driver"
-	depends on I2C
-	help
-	  Say yes here to build support for Analog Devices capacitive sensors.
-	  (AD7745, AD7746, AD7747) Provides direct access via sysfs.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called ad7745.
 
 config AD7816
 	tristate "Analog Devices AD7816/7/8 temperature sensor and ADC driver"

drivers/staging/iio/adc/Makefile

···
 ad7298-$(CONFIG_IIO_BUFFER) += ad7298_ring.o
 obj-$(CONFIG_AD7298) += ad7298.o
 
-obj-$(CONFIG_AD7150) += ad7150.o
-obj-$(CONFIG_AD7152) += ad7152.o
 obj-$(CONFIG_AD7291) += ad7291.o
-obj-$(CONFIG_AD7746) += ad7746.o
 obj-$(CONFIG_AD7780) += ad7780.o
 obj-$(CONFIG_AD7793) += ad7793.o
 obj-$(CONFIG_AD7816) += ad7816.o

drivers/staging/iio/cdc/Kconfig

···
+#
+# CDC drivers
+#
+menu "Capacitance to digital converters"
+
+config AD7150
+	tristate "Analog Devices ad7150/1/6 capacitive sensor driver"
+	depends on I2C
+	help
+	  Say yes here to build support for Analog Devices capacitive sensors.
+	  (ad7150, ad7151, ad7156) Provides direct access via sysfs.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ad7150.
+
+config AD7152
+	tristate "Analog Devices ad7152/3 capacitive sensor driver"
+	depends on I2C
+	help
+	  Say yes here to build support for Analog Devices capacitive sensors.
+	  (ad7152, ad7153) Provides direct access via sysfs.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ad7152.
+
+config AD7746
+	tristate "Analog Devices AD7745, AD7746 AD7747 capacitive sensor driver"
+	depends on I2C
+	help
+	  Say yes here to build support for Analog Devices capacitive sensors.
+	  (AD7745, AD7746, AD7747) Provides direct access via sysfs.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ad7746.
+
+endmenu

drivers/staging/iio/cdc/Makefile

···
+#
+# Makefile for industrial I/O DAC drivers
+#
+
+obj-$(CONFIG_AD7150) += ad7150.o
+obj-$(CONFIG_AD7152) += ad7152.o
+obj-$(CONFIG_AD7746) += ad7746.o