pinctrl: sunxi: Remove stray printk call in sun5i driver's probe function

There is a stray printk call in the new sun5i pinctrl driver's probe
function.

Remove it.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>