dmaengine: sun6i: Add support for the D1 variant

So far it appears to match the configuration of the A100 variant.

Since D1 is a RISC-V chip, it does not meet any of the existing
dependencies for this driver, so relax the dependency somewhat.

Acked-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Link: https://lore.kernel.org/r/20220424172759.33383-5-samuel@sholland.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>