AMD IOMMU: Support IOAPIC IDs larger than 128

AMD IOMMU: Support IOAPIC IDs larger than 128

Currently, the driver uses the APIC ID to index into the ioapic_sbdf array.
The current MAX_IO_APICS is 128, which causes the driver initialization
to fail on the system with IOAPIC ID >= 128.

Instead, this patch adds APIC ID in the struct ioapic_sbdf,
which is used to match the entry when searching through the array.

Also, this patch removes the use of ioapic_cmdline bit-map, which is
used to track the ivrs_ioapic options via command line.
Instead, it introduces the cmdline flag in the struct ioapic_sbdf,
to identify if the entry is created during ivrs_ioapic command-line parsing.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>