pinctrl: spear: simplify the return expression of spear310_pinctrl_probe

Simplify the return expression.

Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lore.kernel.org/r/20200921082448.2591929-1-liushixin2@huawei.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>