arm64: defconfig: Enable Renesas RZ/V2M SoC

Enable the Renesas RZ/V2M SoC and the uart it uses.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Link: https://lore.kernel.org/r/20220330154024.112270-12-phil.edworthy@renesas.com


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