This mode is not used by any existing setup and should not be used
because it overwrites the BBMs. Let's just remove it before someone
starts using it.
Signed-off-by: NBoris Brezillon <boris.brezillon@bootlin.com>
Acked-by: NMaxime Ripard <maxime.ripard@bootlin.com>
Tested-by: NMiquel Raynal <miquel.raynal@bootlin.com>