clk: renesas: rzg2l: Remove CPG_SDHI_DSEL from generic header

Remove CPG_SDHI_DSEL and its bits from the generic header as RZ/G3S has
different offset registers and bits for this, thus avoid mixing them.

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/20230929053915.1530607-10-claudiu.beznea@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>