dt-bindings: iommu: add new compatible strings

dt-bindings: iommu: add new compatible strings

The Allwinner H616 and A523 contain IOMMU IP very similar to the H6, but
use a different reset value for the bypass register, which makes them
strictly speaking incompatible.

Add a new compatible string for the H616, and a version for the A523,
falling back to the H616.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20240616224056.29159-4-andre.przywara@arm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>