Fixes build when hwloc is not installed (#8715)
Fixes build when hwloc is not installed (#8715)

Follow up to 08d35060

Co-authored-by: Chris McFarlen <fedb5e37206e6f73273283631a84f8aa6e3de394@apple.com>
pbchou/trafficserver,vmamidi/trafficserver,pbchou/trafficserver,pbchou/trafficserver,SolidWallOfCode/trafficserver,pbchou/trafficserver,vmamidi/trafficserver,duke8253/trafficserver,vmamidi/trafficserver,SolidWallOfCode/trafficserver,duke8253/trafficserver,vmamidi/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,duke8253/trafficserver,duke8253/trafficserver,pbchou/trafficserver,SolidWallOfCode/trafficserver,vmamidi/trafficserver,SolidWallOfCode/trafficserver,SolidWallOfCode/trafficserver,duke8253/trafficserver,vmamidi/trafficserver,duke8253/trafficserver,duke8253/trafficserver,pbchou/trafficserver