dt-bindings: arm-smmu: Add compatible for Tegra234 SOC

The NVIDIA Tegra234 SoC comes with one single-instance ARM SMMU used by
isochronous memory clients and two dual-instance ARM SMMUs used by non-
isochronous memory clients.

Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20220429082243.496000-3-thierry.reding@gmail.com
Signed-off-by: Will Deacon <will@kernel.org>