pinctrl: samsung: Fix samsung_pinctrl_create_functions return value

Return proper error code in case of memory allocation failure.
Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: NKrzysztof Kozlowski <krzk@kernel.org>
Acked-by: NTomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/samsung/pinctrl-samsung.c

@@ -751,7 +751,7 @@ static struct samsung_pmx_func *samsung_pinctrl_create_functions(
 	functions = devm_kzalloc(dev, func_cnt * sizeof(*functions),
 					GFP_KERNEL);
 	if (!functions)
-		return ERR_PTR(-EINVAL);
+		return ERR_PTR(-ENOMEM);
 	func = functions;
 
 	/*