ARM: shmobile: rcar-gen2: Drop unused OF includes

of_platform.h is not needed, so drop it.

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230717225614.3214179-1-robh@kernel.org


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>