staging:iio:ad799x: Remove unused ad799x_state fields

Remove fields from the ad799x_state struct which are not used.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

drivers/staging/iio/adc/ad799x.h

@@ -104,11 +104,9 @@ struct ad799x_chip_info {
 struct ad799x_state {
 	struct i2c_client		*client;
 	const struct ad799x_chip_info	*chip_info;
-	struct iio_trigger		*trig;
 	struct regulator		*reg;
 	u16				int_vref_mv;
 	unsigned			id;
-	char				*name;
 	u16				config;
 };