PCI: Split out bridge window override of minimum allocation address
pci_bus_alloc_resource() avoids allocating space below the "min" supplied by the caller (usually PCIBIOS_MIN_IO or PCIBIOS_MIN_MEM). This is to protect badly documented motherboard resources. But if we're allocating space inside an already-configured PCI-PCI bridge window, we ignore "min". See 688d1918 ("pci: make bus resource start address override minimum IO address"). This patch moves the check to make it more visible and simplify future patches. No functional change. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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