dt-bindings: arm-smmu: Add X1E80100 GPU SMMU

Update the devicetree bindings to support the gpu present in
X1E80100 platform.

Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Link: https://lore.kernel.org/r/20240629015111.264564-5-quic_akhilpo@quicinc.com


Signed-off-by: Will Deacon <will@kernel.org>