The dma of a100 is similar to h6, with some minor changes to
support greater addressing capabilities.

Add support for it.
Signed-off-by: NYangtao Li <frank@allwinnertech.com>
Link: https://lore.kernel.org/r/719852c6a9a597bd2e82d01a268ca02b9dee826c.1604988979.git.frank@allwinnertech.comSigned-off-by: NVinod Koul <vkoul@kernel.org>