- Allocate SVA domain and setup mmu notifier. In free path unregister
  mmu notifier and free protection domain.

- Add mmu notifier callback function. It will retrieve SVA protection
  domain and invalidates IO/TLB.
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20240418103400.6229-16-vasant.hegde@amd.comSigned-off-by: Joerg Roedel <jroedel@suse.de>