arm64: defconfig: Enable PMIC RAA215300 and RTC ISL 1208 configs

Enable PMIC RAA215300 and ISL 1208 configs, as it is populated
on Renesas RZ/{G2L,V2L} SMARC EVKs.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230703144108.413938-1-biju.das.jz@bp.renesas.com


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