media: sun8i-di: Remove the call to of_dma_configure

of_dma_configure is called by the core before probe gets called so this
is redundant.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>