watchdog/hardlockup/perf: Fix spelling mistake: "permanetely" -> "permanently"

Trivial fix to spelling mistake in pr_info message
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Don Zickus <dzickus@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Babu Moger <babu.moger@oracle.com>
Link: https://lkml.kernel.org/r/20170926093603.7756-1-colin.king@canonical.com

kernel/watchdog_hld.c

@@ -280,7 +280,7 @@ int __init hardlockup_detector_perf_init(void)
 	int ret = hardlockup_detector_event_create();
 
 	if (ret) {
-		pr_info("Perf NMI watchdog permanetely disabled\n");
+		pr_info("Perf NMI watchdog permanently disabled\n");
 	} else {
 		perf_event_release_kernel(this_cpu_read(watchdog_ev));
 		this_cpu_write(watchdog_ev, NULL);