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/include/uapi/linux/xfrm.h b/include/uapi/linux/xfrm.h
index 6550c67..25e5dd9 100644
--- a/include/uapi/linux/xfrm.h
+++ b/include/uapi/linux/xfrm.h
@@ -299,7 +299,7 @@
 	XFRMA_REPLAY_ESN_VAL,	/* struct xfrm_replay_esn */
 	XFRMA_SA_EXTRA_FLAGS,	/* __u32 */
 	XFRMA_PROTO,		/* __u8 */
-	XFRMA_FILTER,		/* struct xfrm_filter */
+	XFRMA_ADDRESS_FILTER,	/* struct xfrm_address_filter */
 	__XFRMA_MAX
 
 #define XFRMA_MAX (__XFRMA_MAX - 1)
@@ -476,7 +476,7 @@
 	__be16				new_sport;
 };
 
-struct xfrm_filter {
+struct xfrm_address_filter {
 	xfrm_address_t			saddr;
 	xfrm_address_t			daddr;
 	__u16				family;