crypto: mcryptd - mcryptd_flist can be static

CC: Tim Chen <tim.c.chen@linux.intel.com>
CC: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

crypto/mcryptd.c

@@ -38,7 +38,7 @@ struct mcryptd_flush_list {
 	struct mutex lock;
 };
 
-struct mcryptd_flush_list __percpu *mcryptd_flist;
+static struct mcryptd_flush_list __percpu *mcryptd_flist;
 
 struct hashd_instance_ctx {
 	struct crypto_shash_spawn spawn;