arm64: dts: renesas: r9a08g045: Update fallback string for SDHI nodes

Use 'renesas,rzg2l-sdhi' as a fallback string for SDHI nodes, where
hs400_disabled and fixed_addr_mode quirks are applied.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240422213006.505576-7-prabhakar.mahadev-lad.rj@bp.renesas.com


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