arm64: dts: renesas: r8a77995: Add R-Car Sound support

This patch adds R-Car Sound and Audio-DMAC support for D3.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87eebtx3zb.wl-kuninori.morimoto.gx@renesas.com


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>