cpufreq: Replace deprecated strcpy() in cpufreq_unregister_governor()

strcpy() is deprecated; assign the NUL terminator directly instead.

Link: https://github.com/KSPP/linux/issues/88
Signed-off-by: Thorsten Blum <[e-mail]>
[ rjw: Subject tweaks ]
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Rafael J. Wysocki <[e-mail]>

drivers/cpufreq/cpufreq.c

···
 	for_each_inactive_policy(policy) {
 		if (!strcmp(policy->last_governor, governor->name)) {
 			policy->governor = NULL;
-			strcpy(policy->last_governor, "\0");
+			policy->last_governor[0] = '\0';
 		}
 	}
 	read_unlock_irqrestore(&cpufreq_driver_lock, flags);