amdsmn(4), amdtemp(4): add support for Family 19h (Zen 3)

Zen 3 "Vermeer" support, tested on Ryzen 9 5950X.

Model numbers from https://en.wikichip.org/wiki/amd/cpuid "Extended
Model" column.

Submitted by: Greg V <greg AT unrelenting.technology>
Differential Revision: https://reviews.freebsd.org/D27552