PCI: Fetch dev_res to local var in __assign_resources_sorted()

PCI: Fetch dev_res to local var in __assign_resources_sorted()

__assign_resources_sorted() calls get_res_add_size() and
get_res_add_align(), each walking through the realloc_head list to
relocate the corresponding pci_dev_resource entry.

Fetch the pci_dev_resource entry into a local variable to avoid double
walk.

In addition, reverse logic to reduce indentation level.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20251219174036.16738-10-ilpo.jarvinen@linux.intel.com