iio:dac:ad5449 replaces IIO_ST macro with explicit entries to struct scan_type

IIO_ST is going away as it is a pain to maintain.

Signed-off-by: Jonathan Cameron <[e-mail]>
Acked-by: Lars-Peter Clausen <[e-mail]>

drivers/iio/dac/ad5449.c

···
 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |		\
 		BIT(IIO_CHAN_INFO_SCALE),			\
 	.address = (chan),					\
-	.scan_type = IIO_ST('u', (bits), 16, 12 - (bits)),	\
+	.scan_type = {						\
+		.sign = 'u',					\
+		.realbits = (bits),				\
+		.storagebits = 16,				\
+		.shift = 12 - (bits),				\
+	},							\
 }
 
 #define DECLARE_AD5449_CHANNELS(name, bits) \