clk: renesas: Add minimal boot support for RZ/G3S SoC

clk: renesas: Add minimal boot support for RZ/G3S SoC

Add minimal clock and reset support for the RZ/G3S SoC to be able to
boot Linux from SD Card/eMMC.  This includes necessary core clocks for
booting and GIC, SCIF, GPIO, and SD0 module clocks and resets.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20231006103959.197485-5-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>