arm64: defconfig: Remove individual Renesas SoC entries

Remove explicit entries for individual Renesas SoCs from the defconfig
file.  Since all Renesas SoCs are enabled by default when ARCH_RENESAS
is selected, and ARCH_RENESAS is already enabled in the defconfig,
listing them separately is redundant.

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/20250401090133.68146-3-prabhakar.mahadev-lad.rj@bp.renesas.com


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