PCI/ACPI: Move pcie_to_hpx3_type[] from stack to static data

Move pcie_to_hpx3_type[] from the stack to static data.  This reduces stack
usage and also makes the object code slightly smaller.

Link: https://lore.kernel.org/r/20200210085256.319424-1-colin.king@canonical.com


Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>