Reset support is present on R-Car. Let's support it, if it is
available.
Signed-off-by: NBiju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: NLad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>