iio: imu: adis16475: make use of irq_get_trigger_type()

There's no need to call both irq_get_irq_data() and
irqd_get_trigger_type() as we already have an helper for that. This
allows for code simplification.
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240117-adis-improv-v1-2-7f90e9fad200@analog.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/imu/adis16475.c

@@ -1363,22 +1363,16 @@ static int adis16475_config_sync_mode(struct adis16475 *st)
 static int adis16475_config_irq_pin(struct adis16475 *st)
 {
 	int ret;
-	struct irq_data *desc;
 	u32 irq_type;
 	u16 val = 0;
 	u8 polarity;
 	struct spi_device *spi = st->adis.spi;
 
-	desc = irq_get_irq_data(spi->irq);
-	if (!desc) {
-		dev_err(&spi->dev, "Could not find IRQ %d\n", spi->irq);
-		return -EINVAL;
-	}
 	/*
 	 * It is possible to configure the data ready polarity. Furthermore, we
 	 * need to update the adis struct if we want data ready as active low.
 	 */
-	irq_type = irqd_get_trigger_type(desc);
+	irq_type = irq_get_trigger_type(spi->irq);
 	if (irq_type == IRQ_TYPE_EDGE_RISING) {
 		polarity = 1;
 		st->adis.irq_flag = IRQF_TRIGGER_RISING;