Input: cyttsp4 - kfree xfer_buf on error path in probe()

If probe() fails after cd->xfer_buf allocated, it will not freed.
Added kfree(cd->xfer_buf) with and error label.

Signed-off-by: Ferruh Yigit <fery@cypress.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/touchscreen/cyttsp4_core.c

@@ -2049,7 +2049,7 @@ struct cyttsp4 *cyttsp4_probe(const struct cyttsp4_bus_ops *ops,
 	cd->irq = gpio_to_irq(cd->cpdata->irq_gpio);
 	if (cd->irq < 0) {
 		rc = -EINVAL;
-		goto error_free_cd;
+		goto error_free_xfer;
 	}
 
 	dev_set_drvdata(dev, cd);
@@ -2117,6 +2117,8 @@ error_request_irq:
 	if (cd->cpdata->init)
 		cd->cpdata->init(cd->cpdata, 0, dev);
 	dev_set_drvdata(dev, NULL);
+error_free_xfer:
+	kfree(cd->xfer_buf);
 error_free_cd:
 	kfree(cd);
 error_alloc_data: