arm: renesas: Add config option for R8A774B1 SoC

Add config support for RZ/G2N(a.k.a R8A774B1) SoC.

Also fixed the alignment issue on R8A774A1 config.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
1 file changed