ARM: dts: sun8i-h3: Add device nodes for audio codec and its analog controls

Now that we support the audio codec found on the Allwinner H3 SoC, add
device nodes for it.

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