sysreset: gpio: fix gpio_reboot_request return value

It should return -EINPROGRESS if successful otherwise sysreset-uclass
will continue to the next sysreset device.

Signed-off-by: Jonathan Liu <net147@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/sysreset/sysreset_gpio.c b/drivers/sysreset/sysreset_gpio.c
index dfca10c..de42b59 100644
--- a/drivers/sysreset/sysreset_gpio.c
+++ b/drivers/sysreset/sysreset_gpio.c
@@ -17,6 +17,7 @@
 static int gpio_reboot_request(struct udevice *dev, enum sysreset_t type)
 {
 	struct gpio_reboot_priv *priv = dev_get_priv(dev);
+	int ret;
 
 	/*
 	 * When debug log is enabled please make sure that chars won't end up
@@ -26,7 +27,11 @@
 	debug("GPIO reset\n");
 
 	/* Writing 1 respects polarity (active high/low) based on gpio->flags */
-	return dm_gpio_set_value(&priv->gpio, 1);
+	ret = dm_gpio_set_value(&priv->gpio, 1);
+	if (ret < 0)
+		return ret;
+
+	return -EINPROGRESS;
 }
 
 static struct sysreset_ops gpio_reboot_ops = {