there is no irq link. Since we now use the stored copy of PRT, not the
one that used to be passed into acpi_pcib_route_interrupt(), we need it in
the list. [1]
Fix a bug in acpi_pci_find_prt() where we weren't checking the bus, thus
choosing the wrong PRT entry to use for routing the link. Also, add a
printf for the case where the PRT entry is not found as this should not
happen.
Tested by: marcel [1]