[IPV6]: make frag to return an error at initialization

This patch makes the frag_init to return an error code, so the af_inet6
module can handle the error.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/transp_v6.h b/include/net/transp_v6.h
index 610b1bb7..aa9a4a6 100644
--- a/include/net/transp_v6.h
+++ b/include/net/transp_v6.h
@@ -19,7 +19,8 @@
 /* extention headers */
 extern int				ipv6_exthdrs_init(void);
 extern void				ipv6_exthdrs_exit(void);
-extern void				ipv6_frag_init(void);
+extern int				ipv6_frag_init(void);
+extern void				ipv6_frag_exit(void);
 
 /* transport protocols */
 extern void				rawv6_init(void);