x86/pmu: Add global helpers to cover Intel Arch PMU Version 1

To test Intel arch pmu version 1, most of the basic framework and
use cases which test any PMU counter do not require any changes,
except no access to registers introduced only in PMU version 2.

Adding some guardian's checks can seamlessly support version 1,
while opening the door for normal AMD PMUs tests.

Signed-off-by: Like Xu <likexu@tencent.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20221102225110.3023543-24-seanjc@google.com