iommu-fixes-v5.6-rc2

Including:

	- Compile warning fix for the Intel IOMMU driver

	- Fix kdump boot with Intel IOMMU enabled and in passthrough
	  mode

	- Disable AMD IOMMU on a Laptop/Embedded platform because the
	  delay in introduces in DMA transactions causes screen
	  flickering there with 4k monitors

	- Make domain_free function in QCOM IOMMU driver robust and not
	  leak memory/dereference NULL pointers

	- Fix ARM-SMMU module parameter prefix names