The Knights Landings support added the events and the detection case, but then
returns 0 without actually initializing the driver.

Fixes: 3a2a7797326a4 "perf/x86/intel/rapl: Add support for Knights Landing (KNL)"
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com>
---
 arch/x86/kernel/cpu/perf_event_intel_rapl.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: b/arch/x86/kernel/cpu/perf_event_intel_rapl.c
===================================================================
--- a/arch/x86/kernel/cpu/perf_event_intel_rapl.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_rapl.c
@@ -731,7 +731,7 @@ static int __init rapl_pmu_init(void)
 		rapl_add_quirk(rapl_hsw_server_quirk);
 		rapl_cntr_mask = RAPL_IDX_KNL;
 		rapl_pmu_events_group.attrs = rapl_events_knl_attr;
-
+		break;
 	default:
 		/* unsupported */
 		return 0;