arm64: dts: renesas: r9a07g054: Add SSI{1,2,3} nodes and fillup the SSI0 stub node

Add SSI{1,2,3} nodes and fillup the SSI0 stub node in RZ/V2L
(R9A07G054) SoC DTSI.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20220227203744.18355-10-prabhakar.mahadev-lad.rj@bp.renesas.com


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