Input: edt-ft5x06 - drop parsing of irq gpio

The driver does not use irq gpio as gpio, but rather relies on I2C core or
board code to set up client's structure IRQ line, so let's stop trying to
locate the resource and parse it.
Tested-by: NFranklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/edt-ft5x06.c

@@ -92,7 +92,6 @@ struct edt_ft5x06_ts_data {
 
 	struct gpio_desc *reset_gpio;
 	struct gpio_desc *wake_gpio;
-	struct gpio_desc *irq_gpio;
 
 #if defined(CONFIG_DEBUG_FS)
 	struct dentry *debug_dir;
@@ -927,15 +926,6 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
 		return error;
 	}
 
-	tsdata->irq_gpio = devm_gpiod_get_optional(&client->dev,
-						   "irq", GPIOD_IN);
-	if (IS_ERR(tsdata->irq_gpio)) {
-		error = PTR_ERR(tsdata->irq_gpio);
-		dev_err(&client->dev,
-			"Failed to request GPIO irq pin, error %d\n", error);
-		return error;
-	}
-
 	if (tsdata->wake_gpio) {
 		usleep_range(5000, 6000);
 		gpiod_set_value_cansleep(tsdata->wake_gpio, 1);