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>
diff --git a/arch/arm/mach-msm/perf_debug.c b/arch/arm/mach-msm/perf_debug.c
index 74678ae..a072878 100644
--- a/arch/arm/mach-msm/perf_debug.c
+++ b/arch/arm/mach-msm/perf_debug.c
@@ -34,6 +34,7 @@
 	"14 Perf: keep events across hotplug\n"
 	"15 Perf: bring CPU online if needed when disabling irq\n"
 	"16 Perf: Support sw events across hotplug\n"
+	"17 msm: perf: initialise krait perf L2 counter enables\n"
 ;
 
 static ssize_t desc_read(struct file *fp, char __user *buf,