ARM: sunxi: Add the missing clocks to the pinctrl nodes

The pin controllers also use the two oscillators for debouncing. Add them
to the DTs.

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