ARM: dts: sun8i: Add codec analog path controls node in PRCM for A23/A33

On the A23/A33, the internal codec's analog path controls are located in
the PRCM node.

Add a sub-device node to the PRCM for it.

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