iio: srf08: fix link error "devm_iio_triggered_buffer_setup" undefined

commit 511051d upstream.

Functions for triggered buffer support are needed by this module.
If they are not defined accidentally by another driver, there's an error
thrown out while linking.

Add a select of IIO_BUFFER and IIO_TRIGGERED_BUFFER in the Kconfig file.

Signed-off-by: Andreas Klinger <[email protected]>
Fixes: a831959 ("iio: srf08: add triggered buffer support")
Cc: <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: it-klinger

drivers/iio/proximity/Kconfig

@@ -58,6 +58,8 @@ config SX9500
 
 config SRF08
 	tristate "Devantech SRF02/SRF08/SRF10 ultrasonic ranger sensor"
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
 	depends on I2C
 	help
 	  Say Y here to build a driver for Devantech SRF02/SRF08/SRF10