msm: perf: initialise krait perf L2 counter enables
Clear the L2 counter enables at initialisation. They are undefined out of reset. Change-Id: I957106012625ae09efec47d4f657381963d87a5a Signed-off-by: Neil Leeder <nleeder@codeaurora.org>

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