[CPUFREQ] Fix build of longhaul.

Arjan noted that in some cases, the build fails.
This should fix it up.

arch/i386/kernel/cpu/cpufreq/longhaul.c

@@ -529,7 +529,7 @@ static int __init longhaul_cpu_init (struct cpufreq_policy *policy)
 	return 0;
 }
 
-static int __exit longhaul_cpu_exit(struct cpufreq_policy *policy)
+static int __devexit longhaul_cpu_exit(struct cpufreq_policy *policy)
 {
 	cpufreq_frequency_table_put_attr(policy->cpu);
 	return 0;
@@ -545,7 +545,7 @@ static struct cpufreq_driver longhaul_driver = {
 	.target	= longhaul_target,
 	.get	= longhaul_get,
 	.init	= longhaul_cpu_init,
-	.exit	= longhaul_cpu_exit,
+	.exit	= __devexit_p(longhaul_cpu_exit),
 	.name	= "longhaul",
 	.owner	= THIS_MODULE,
 	.attr	= longhaul_attr,