Perf: arm64: Add L1 counters to tracepoints

Create tracepoints framework for collecting L1 counters on
per-pid basis.
Add hooks into scheduler to invoke collection.

Change-Id: I04cbf0c526162e70680573f5f365f8b41d3079ed
Signed-off-by: Sheetal Sahasrabudhe <sheetals@codeaurora.org>