ACPICA: Update handling of PCI ID lists.

More of a style cleanup. If hw_build_pci_list is to return a non-zero
status, it now deletes any partial ID list that has been constructed.
If it returns AE_OK, the caller is responsible for list deletion.
David Box.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>