[PATCH v11 60/60] PCI: Only try to assign io port only for root bus that support it

The PCI subsystem always assumes that I/O is supported on root bus and tries to assign an I/O window to each child bus even if that is not the case. The use cases is on Intel 8 socket system that have 8 root buses, last two root buses would not have io port resources from _CRS. Check if root bus

[PATCH v11 60/60] PCI: Only try to assign io port only for root bus that support it

The PCI subsystem always assumes that I/O is supported on root bus and tries to assign an I/O window to each child bus even if that is not the case. The use cases is on Intel 8 socket system that have 8 root buses, last two root buses would not have io port resources from _CRS. Check if root bus