xfrm: rename struct xfrm_filter

iproute2 already defines a structure with that name, let's use another one to
avoid any conflict.

CC: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 5339c26..cee850c 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -1598,7 +1598,7 @@
 EXPORT_SYMBOL(xfrm_alloc_spi);
 
 static bool __xfrm_state_filter_match(struct xfrm_state *x,
-				      struct xfrm_filter *filter)
+				      struct xfrm_address_filter *filter)
 {
 	if (filter) {
 		if ((filter->family == AF_INET ||
@@ -1657,7 +1657,7 @@
 EXPORT_SYMBOL(xfrm_state_walk);
 
 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
-			  struct xfrm_filter *filter)
+			  struct xfrm_address_filter *filter)
 {
 	INIT_LIST_HEAD(&walk->all);
 	walk->proto = proto;