xfrm: prefer family stored in xfrm_mode struct

Now that we have the family available directly in the
xfrm_mode struct, we can use that and avoid one extra dereference.

Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
diff --git a/net/xfrm/xfrm_interface.c b/net/xfrm/xfrm_interface.c
index dbb3c194..93efb09 100644
--- a/net/xfrm/xfrm_interface.c
+++ b/net/xfrm/xfrm_interface.c
@@ -285,7 +285,7 @@
 		}
 
 		if (!xfrm_policy_check(NULL, XFRM_POLICY_IN, skb,
-				       inner_mode->afinfo->family))
+				       inner_mode->family))
 			return -EPERM;
 	}