pinctrl: samsung: fix fwnode refcount cleanup if platform_get_irq_optional() fails

Commit 50ebd19 ("pinctrl: samsung: drop pin banks references on
error paths") fixed the pin bank references on the error paths of the
probe function, but there is still an error path where this is not done.

If samsung_pinctrl_get_soc_data() does not fail, the child references
will have acquired, and they will need to be released in the error path
of platform_get_irq_optional(), as it is done in the following error
paths within the probe function.

Replace the direct return in the error path with a goto instruction to
the cleanup function.

Cc: [email protected]
Fixes: a382d56 ("pinctrl: samsung: Use platform_get_irq_optional() to get the interrupt")
Signed-off-by: Javier Carrasco <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[krzysztof: change Fixes SHA to point to commit introducing the return
 leading to OF node leak]
Signed-off-by: Krzysztof Kozlowski <[email protected]>

Author: javiercarrascocruz

drivers/pinctrl/samsung/pinctrl-samsung.c

@@ -1272,7 +1272,7 @@ static int samsung_pinctrl_probe(struct platform_device *pdev)
 
 	ret = platform_get_irq_optional(pdev, 0);
 	if (ret < 0 && ret != -ENXIO)
-		return ret;
+		goto err_put_banks;
 	if (ret > 0)
 		drvdata->irq = ret;