xfrm: update outdated comment

The function __xfrm4_bundle_create() was refactored into
xfrm_bundle_create() (among others) by commit 25ee3286dcbc
("xfrm: Merge common code into xfrm_bundle_create"). The
responsibility for setting dst->obsolete to DST_OBSOLETE_FORCE_CHK
now lives in xfrm_bundle_create(). Update the comment accordingly.

Signed-off-by: kexinsun <kexinsun@smail.nju.edu.cn>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 62486f8..7bcb658 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -3910,7 +3910,7 @@ EXPORT_SYMBOL(__xfrm_route_forward);
 
 static struct dst_entry *xfrm_dst_check(struct dst_entry *dst, u32 cookie)
 {
-	/* Code (such as __xfrm4_bundle_create()) sets dst->obsolete
+	/* Code (such as xfrm_bundle_create()) sets dst->obsolete
 	 * to DST_OBSOLETE_FORCE_CHK to force all XFRM destinations to
 	 * get validated by dst_ops->check on every use.  We do this
 	 * because when a normal route referenced by an XFRM dst is