From: Joel Granados<j.granados@xxxxxxxxxxx>
IO page faults are no longer dependent on CONFIG_INTEL_IOMMU_SVM. Move
all Page Request Queue (PRQ) functions that handle prq events to a new
file in drivers/iommu/intel/prq.c. The page_req_des struct is made
available in drivers/iommu/intel/iommu.h.