Add serial support for RZ/G2L SoC with earlycon and
extended mode register support.
Signed-off-by: NBiju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: NLad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20210514192218.13022-11-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>