[X25]: use LIST_HEAD instead of LIST_HEAD_INIT

single list_head variable initialized with LIST_HEAD_INIT could almost
always can be replaced with LIST_HEAD declaration, this shrinks the code
and looks better.

Signed-off-by: Denis Cheng <crquan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/x25/x25_route.c b/net/x25/x25_route.c
index 86b5b4d..2c999cc 100644
--- a/net/x25/x25_route.c
+++ b/net/x25/x25_route.c
@@ -21,7 +21,7 @@
 #include <linux/init.h>
 #include <net/x25.h>
 
-struct list_head x25_route_list = LIST_HEAD_INIT(x25_route_list);
+LIST_HEAD(x25_route_list);
 DEFINE_RWLOCK(x25_route_list_lock);
 
 /*