iio: accel: adxl345: make data struct variable irq function local

Remove variable irq from the struct state and make it a function local
variable, because it is not necessary to be kept struct-wise.

This is a refactoring change and should not impact functionality.

Signed-off-by: Lothar Rubusch <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/accel/adxl345_core.c

···
 	const struct adxl345_chip_info *info;
 	struct regmap *regmap;
 	bool fifo_delay; /* delay: delay is needed for SPI */
-	int irq;
 	u8 watermark;
 	u8 fifo_mode;
 
···
 					 ADXL345_DATA_FORMAT_FULL_RES |
 					 ADXL345_DATA_FORMAT_SELF_TEST);
 	unsigned int tap_threshold;
+	int irq;
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
···
 	if (ret)
 		return ret;
 
-	st->irq = fwnode_irq_get_byname(dev_fwnode(dev), "INT1");
-	if (st->irq < 0) {
+	irq = fwnode_irq_get_byname(dev_fwnode(dev), "INT1");
+	if (irq < 0) {
 		intio = ADXL345_INT2;
-		st->irq = fwnode_irq_get_byname(dev_fwnode(dev), "INT2");
-		if (st->irq < 0)
+		irq = fwnode_irq_get_byname(dev_fwnode(dev), "INT2");
+		if (irq < 0)
 			intio = ADXL345_INT_NONE;
 	}
 
···
 		if (ret)
 			return ret;
 
-		ret = devm_request_threaded_irq(dev, st->irq, NULL,
+		ret = devm_request_threaded_irq(dev, irq, NULL,
 						&adxl345_irq_handler,
 						IRQF_SHARED | IRQF_ONESHOT,
 						indio_dev->name, indio_dev);