The IOMMU IP in the Allwinner H616 SoC is *almost* compatible to the H6,
but uses a different reset value for the bypass register, and adds some
more registers.

While a driver *can* be written to support both variants (which we in
fact do), the hardware itself is not fully compatible, so we require a
separate compatible string.

Add the new compatible string to the list, but without changing the
behaviour, since the driver already supports both variants.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20240616224056.29159-5-andre.przywara@arm.comSigned-off-by: Joerg Roedel <jroedel@suse.de>