[RFC v3 1/3] eal/lcore: add topology based functions

[Varghese, Vipin]

Snipped
> 
> On Wed, 30 Oct 2024 11:11:31 +0530
> Vipin Varghese <vipin.varghese at amd.com> wrote:
> 
> > +     if (topo_cnfg.io) {
> > +             free(topo_cnfg.io);
> > +             topo_cnfg.io = NULL;
> > +     }
> 
> No need to check for NULL before calling free.

Thank you Stepehen on this, the reason why we specifically added to address 2 scenarios
 1. as pointed out by Wathsala where System Level Cache will be disabled; where L3 will be not available at all
 2. for version where hwloc does not detect the specific cache level.

By checking the NULL we can avoid such cases.

Note: I will recheck and add|remove this in v4