iio: adc: twl4030-madc: Re-use generic struct s16_fract

Instead of custom data type re-use generic struct s16_fract.
No changes intended.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220126135353.24007-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/twl4030-madc.c

@@ -231,13 +231,7 @@ static const struct iio_chan_spec twl4030_madc_iio_channels[] = {
 
 static struct twl4030_madc_data *twl4030_madc;
 
-struct twl4030_prescale_divider_ratios {
-	s16 numerator;
-	s16 denominator;
-};
-
-static const struct twl4030_prescale_divider_ratios
-twl4030_divider_ratios[16] = {
+static const struct s16_fract twl4030_divider_ratios[16] = {
 	{1, 1},		/* CHANNEL 0 No Prescaler */
 	{1, 1},		/* CHANNEL 1 No Prescaler */
 	{6, 10},	/* CHANNEL 2 */
@@ -256,7 +250,6 @@ twl4030_divider_ratios[16] = {
 	{5, 11},	/* CHANNEL 15 */
 };
 
-
 /* Conversion table from -3 to 55 degrees Celcius */
 static int twl4030_therm_tbl[] = {
 	30800,	29500,	28300,	27100,