xfrm: trivial typos

o s/descentant/descendant
o s/workarbound/workaround

Signed-off-by: Alexander Alemayhu <alexander@alemayhu.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 177e208..99ad1af2 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -330,7 +330,7 @@ void xfrm_policy_destroy(struct xfrm_policy *policy)
 }
 EXPORT_SYMBOL(xfrm_policy_destroy);
 
-/* Rule must be locked. Release descentant resources, announce
+/* Rule must be locked. Release descendant resources, announce
  * entry dead. The rule must be unlinked from lists to the moment.
  */