clk: renesas: r8a779g0: Add Audio clocks

Add module clocks for the Audio (SSI/SSIU) blocks on the Renesas R-Car
V4H (R8A779G0) SoC.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/878rhganfo.wl-kuninori.morimoto.gx@renesas.com


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