Revert "tracing: PM: Remove unused clock events"

This reverts commit de6fdc07.

These are still used by loadable modules so bring them back temporarily
while a more adequate solution is implemented.

Bug: 429926222
Change-Id: I4e52f768ba2e9c5645e142011ba8489422944f6f
Signed-off-by: Carlos Llamas <cmllamas@google.com>