Implement Intel Leaf=07h Subleaf=01h

[Borketh]

https://en.wikipedia.org/wiki/CPUID#EAX=7,_ECX=1:_Extended_Features

Willing to try my hand at doing it myself - I need the avx_vnni flag in my project.

[Borketh]

Not to be confused with https://en.wikipedia.org/wiki/CPUID#EAX=80000021h:_Extended_Feature_Identification_2, which could be a separate issue if someone needs that.

[gz]

Definitely, feel free to send a PR. Otherwise we'll have to wait until I get around upgrading it. Currently the crate is at the SDM state from ~2018 for Intel CPUs.