Add tool support for creating bootparam and cert_header images
for RZ/G2 SoC based platforms.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Change-Id: Iab8ba6eda442c8d75f23c5633b8178f86339e4c9