TSC: Use 0x40000010 CPUID leaf for all VM types

While this CPUID leaf was originally only used by VMWare, other
hypervisors now also use it to announce the TSC frequency to guests.

This speeds up the boot process by 100 ms in EC2 and other systems,
by allowing the early calibration DELAY to be skipped.

Reviewed by: markj
Sponsored by: https://www.patreon.com/cperciva