PciSlotLocCodes: permit loc-code but no slot-name
PciSlotLocCodes: permit loc-code but no slot-name

things may have a loc-code but no slot name.

e.g. a switch on the planar.

Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.ibm.com>

open-power/op-test-framework,open-power/op-test-framework,open-power/op-test-framework