When adding an event to the PMU with PERF_EF_START the STOPPED and UPTODATE
flags need to be cleared in the hw.event status variable because they are
preventing the update of the event count on overflow interrupt.
Signed-off-by: NAlexandru-Cezar Sardan <alexandru.sardan@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>