perf/x86: Fix event constraint for SandyBridge-EP C-Box

The constraint for C-Box event 0x1f should have overlap flag set.
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1340866596-22502-2-git-send-email-zheng.z.yan@intel.comSigned-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/kernel/cpu/perf_event_intel_uncore.c

@@ -239,7 +239,7 @@ static struct event_constraint snbep_uncore_cbox_constraints[] = {
 	UNCORE_EVENT_CONSTRAINT(0x1c, 0xc),
 	UNCORE_EVENT_CONSTRAINT(0x1d, 0xc),
 	UNCORE_EVENT_CONSTRAINT(0x1e, 0xc),
-	UNCORE_EVENT_CONSTRAINT(0x1f, 0xe),
+	EVENT_CONSTRAINT_OVERLAP(0x1f, 0xe, 0xff),
 	UNCORE_EVENT_CONSTRAINT(0x21, 0x3),
 	UNCORE_EVENT_CONSTRAINT(0x23, 0x3),
 	UNCORE_EVENT_CONSTRAINT(0x31, 0x3),