Input: ps2-gpio - actually abort probe when connected to sleeping GPIOs

We've been missing a goto to the unwind path...

Acked-by: Danilo Krummrich <danilokrummrich@dk-develop.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
diff --git a/drivers/input/serio/ps2-gpio.c b/drivers/input/serio/ps2-gpio.c
index b50e381..c62cceb 100644
--- a/drivers/input/serio/ps2-gpio.c
+++ b/drivers/input/serio/ps2-gpio.c
@@ -366,6 +366,7 @@ static int ps2_gpio_probe(struct platform_device *pdev)
 	    gpiod_cansleep(drvdata->gpio_clk)) {
 		dev_err(dev, "GPIO data or clk are connected via slow bus\n");
 		error = -EINVAL;
+		goto err_free_serio;
 	}
 
 	drvdata->irq = platform_get_irq(pdev, 0);