[as4630_54te] Fix the error "PTE Write access is not set"

[brandonchuang]

Disable intel_iommu to prevent below error messages: [10672.868940] DMAR: [DMA Write] Request device [00:12.0] fault addr 0 [fault reason 05] PTE Write access is not set [10672.869183] DMAR: DRHD: handling fault status reg 2 [10672.869188] DMAR: [DMA Write] Request device [00:12.0] fault addr 0 [fault reason 05] PTE Write access is not set [10672.869443] DMAR: DRHD: handling fault status reg 2 [10672.869448] DMAR: [DMA Write] Request device [00:12.0] fault addr 0 [fault reason 05] PTE Write access is not set [10672.870074] DMAR: DRHD: handling fault status reg 2 [10677.928602] dmar_fault: 2474 callbacks suppressed [10677.928604] DMAR: DRHD: handling fault status reg 2

Signed-off-by: Brandon Chuang [email protected]