Input: wm831x-ts - convert to devm_kzalloc()

Saves a little code and eliminates the possibility of introducing some
leaks.

Signed-off-by: Mark Brown <[e-mail]>
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/touchscreen/wm831x-ts.c

···
 	if (core_pdata)
 		pdata = core_pdata->touch;
 
-	wm831x_ts = kzalloc(sizeof(struct wm831x_ts), GFP_KERNEL);
+	wm831x_ts = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ts),
+				 GFP_KERNEL);
 	input_dev = input_allocate_device();
 	if (!wm831x_ts || !input_dev) {
 		error = -ENOMEM;
···
 	free_irq(wm831x_ts->data_irq, wm831x_ts);
 err_alloc:
 	input_free_device(input_dev);
-	kfree(wm831x_ts);
 
 	return error;
 }
···
 	free_irq(wm831x_ts->pd_irq, wm831x_ts);
 	free_irq(wm831x_ts->data_irq, wm831x_ts);
 	input_unregister_device(wm831x_ts->input_dev);
-	kfree(wm831x_ts);
 
 	return 0;
 }