Arm SMMU updates for 6.13
- SMMUv2:
* Return -EPROBE_DEFER for client devices probing before their SMMU.
* Devicetree binding updates for Qualcomm MMU-500 implementations.
- SMMUv3:
* Minor fixes and cleanup for NVIDIA's virtual command queue driver.
- IO-PGTable:
* Fix indexing of concatenated PGDs and extend selftest coverage.
* Remove unused block-splitting support.