arm64: dts: renesas: rzg2l-smarc: Enable microSD on SMARC platform

This patch enables microSD card slot connected to SDHI1 on RZ/G2L SMARC
platform.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20211010142520.21976-3-biju.das.jz@bp.renesas.com


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