iommu/amd: Introduce per PCI segment alias table size

It will replace global "alias_table_size" variable.

Co-developed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Link: https://lore.kernel.org/r/20220706113825.25582-13-vasant.hegde@amd.com


Signed-off-by: Joerg Roedel <jroedel@suse.de>