[PATCH v9 43/60] PCI: Add alt_size ressource allocation support

On system with several pcie switches, BIOS allocate very tight resources to the bridge bar, and it is not aligned to min_align as kernel allocation code. For example: 02:03.0---0c:00.0---0d:04.0---18:00.0 18:00.0 need 0x1000, and 0x0001. BIOS only allocate 0x1010 to 0d:04.0 and

[PATCH v9 43/60] PCI: Add alt_size ressource allocation support

On system with several pcie switches, BIOS allocate very tight resources to the bridge bar, and it is not aligned to min_align as kernel allocation code. For example: 02:03.0---0c:00.0---0d:04.0---18:00.0 18:00.0 need 0x1000, and 0x0001. BIOS only allocate 0x1010 to 0d:04.0 and