crypto: n2 - use __devexit not __exit in n2_unregister_algs

fixes fedora sparc build failure, thanks to kylem for helping with debugging
Signed-off-by: NDennis Gilmore <dgilmore@redhat.com>
Acked-by: David S. Miller <davem@davemloft.net>  
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/n2_core.c

@@ -1542,7 +1542,7 @@ static int __devinit n2_register_algs(void)
 	return err;
 }
 
-static void __exit n2_unregister_algs(void)
+static void __devexit n2_unregister_algs(void)
 {
 	mutex_lock(&spu_lock);
 	if (!--algs_registered)