Perf: Make per-process counters configurable
Add feature to enable/disable per-process tracecounters at run-time. Change-Id: Id6a4c7a0ecd1f5add85464c6ed260860e15c4e3b Signed-off-by: Sheetal Sahasrabudhe <sheetals@codeaurora.org>

Signed-off-by: evolutionmod <kernelcraft@gmail.com>