Trivial: Clean up some typos.

Change-Id: I085615fde1f966490f30ed5d32017b8b088cfd59
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
diff --git a/src/vnet/ipsec/ikev2.h b/src/vnet/ipsec/ikev2.h
index 84a8be5..55731bf 100644
--- a/src/vnet/ipsec/ikev2.h
+++ b/src/vnet/ipsec/ikev2.h
@@ -193,7 +193,7 @@
 } ikev2_notify_msg_type_t;
 
 #define foreach_ikev2_transform_type       \
-  _(0, UNDEFINED, "undefinded") \
+  _(0, UNDEFINED, "undefined") \
   _(1, ENCR,  "encr")           \
   _(2, PRF,   "prf")            \
   _(3, INTEG, "integ")          \