Remove Marzen legacy board code written in C. Instead
board support expressed in DT shall be used together
with Multiplatform and shmobile_defconfig.
Signed-off-by: NMagnus Damm <damm+renesas@opensource.se>
Acked-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>