Add support for the SPI NOR device used to boot up the system
to the iWave RZ/G1N Qseven System On Module DT.
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>