[PATCH] iio: adc: dln2-adc: fix build error

[Randy Dunlap]

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

The dln2-adc driver uses interface(s) that are controlled by the
IIO_TRIGGERED_BUFFER Kconfig symbol, so the driver needs to select
that symbol to prevent the build error.

drivers/iio/adc/dln2-adc.o: In function `dln2_adc_probe':
dln2-adc.c:(.text+0x528): undefined reference to `devm_iio_triggered_buffer_setup'

Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reported-by: kbuild test robot <fengguang.wu@xxxxxxxxx>
Cc: Jonathan Cameron <jic23@xxxxxxxxxx>
Cc: linux-iio@xxxxxxxxxxxxxxx
Cc: Jack Andersen <jackoalan@xxxxxxxxx>
---
 drivers/iio/adc/Kconfig |    2 ++
 1 file changed, 2 insertions(+)

--- lnx-414-rc3.orig/drivers/iio/adc/Kconfig
+++ lnx-414-rc3/drivers/iio/adc/Kconfig
@@ -243,6 +243,8 @@ config DA9150_GPADC
 config DLN2_ADC
 	tristate "Diolan DLN-2 ADC driver support"
 	depends on MFD_DLN2
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
 	help
 	  Say yes here to build support for Diolan DLN-2 ADC.