Just like on the A33, the video engine on the H3 can map any address in
memory, so there is no particular need to have reserved memory at a fixed
address.

As a result, remove the reserved memory node and let the kernel allocate
the CMA pool wherever it sees fit.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>