Revert "staging: iio: ak8975: add platform data."

This reverts commit f2f1794.

It should not be putting code into the include/input/ directory, and
lots of other people have complained about it.

Cc: Tony SIM <chinyeow.sim.xt@renesas.com>
Cc: Andrew Chew <achew@nvidia.com>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/magnetometer/ak8975.c

@@ -29,7 +29,6 @@
 #include <linux/delay.h>
 
 #include <linux/gpio.h>
-#include <linux/input/ak8975.h>
 
 #include "../iio.h"
 #include "magnet.h"
@@ -436,7 +435,6 @@ static int ak8975_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
 {
 	struct ak8975_data *data;
-	struct ak8975_platform_data *pdata;
 	int err;
 
 	/* Allocate our device context. */
@@ -454,11 +452,7 @@ static int ak8975_probe(struct i2c_client *client,
 
 	/* Grab and set up the supplied GPIO. */
 	data->eoc_irq = client->irq;
-	pdata = client->dev.platform_data;
-	if (pdata)
-		data->eoc_gpio = pdata->gpio;
-	else
-		data->eoc_gpio = irq_to_gpio(client->irq);
+	data->eoc_gpio = irq_to_gpio(client->irq);
 
 	if (!data->eoc_gpio) {
 		dev_err(&client->dev, "failed, no valid GPIO\n");