Support AMD SVM flag in vGPU precheck

[Azerothian]

Summary

• Fixes vGPU precheck failing on AMD systems by detecting the svm flag in addition to vmx from lscpu output
• Updates the error message to reference both Intel VT and AMD-V

Fixes #124

Test plan

• On Intel: lscpu output contains vmx — precheck passes (unchanged behavior)
• On AMD: lscpu output contains svm — precheck now passes (previously failed)
• On neither: error message says "No VMX/SVM flag, Please ensure Intel VT or AMD-V enabled in BIOS"

[Azerothian]

Wow, how hard is it to merge this one?

[eero-t]

Whole XPUM code base has been rewritten (mostly before this PR).

In v2.x code base, VMX check is here: https://github.com/intel/xpumanager/blob/main/oal/lin/linvf.cpp#L927

It seems to be missing SVM check too.

[eero-t]

@Azerothian I raised this internally (I'm myself looking after XPUMD v2 Go code, not XPU-SMI v1/v2).

Wow, how hard is it to merge this one?

Besides the 2.0 (rewrite) release having kept the new XPUM team busy, project notifications not having worked (for the new XPUM team), larger issue is lack of AMD HW in XPUMD validation (currently all test HW is Intel based). So, please bear with us...

PS. Currently code would get merged to internal repository, not here, so you would not see the change before code is synced for the next release (v2.x main branch contains the actual internal commits, instead per-release mega-commits that v1.x master branch had).