ARM: sun5i: chip: Enable Wi-Fi SDIO chip

The WiFi chip is powered through a GPIO and two regulators in parallel.
Since that case is not supported yet, just set them as always on before we
rework the regulator framework to deal with those.

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