[qca-nss-ecm] ifdef'd all the IPIP6 interface code.

* This will make it easy to remove IPIP6 code from the compilation.

Change-Id: Ic6981bbfabde1551dde8814277d9d4491a55b710
Signed-off-by: Murat Sezgin <msezgin@codeaurora.org>
diff --git a/ecm_db.h b/ecm_db.h
index 9e99e8b..dc34e74 100644
--- a/ecm_db.h
+++ b/ecm_db.h
@@ -141,8 +141,9 @@
 #ifdef ECM_INTERFACE_SIT_ENABLE
 struct ecm_db_iface_instance *ecm_db_iface_find_and_ref_sit(ip_addr_t saddr, ip_addr_t daddr);
 #endif
+#ifdef ECM_INTERFACE_TUNIPIP6_ENABLE
 struct ecm_db_iface_instance *ecm_db_iface_find_and_ref_tunipip6(ip_addr_t saddr, ip_addr_t daddr);
-
+#endif
 struct ecm_db_node_instance *ecm_db_node_find_and_ref(uint8_t *address);
 
 void ecm_db_connection_from_interfaces_reset(struct ecm_db_connection_instance *ci, struct ecm_db_iface_instance *interfaces[], int32_t new_first);
@@ -233,8 +234,9 @@
 bool ecm_db_iface_sit_daddr_is_null(struct ecm_db_iface_instance *ii);
 void ecm_db_iface_add_sit(struct ecm_db_iface_instance *ii, struct ecm_db_interface_info_sit *type_info, char *name, int32_t mtu, int32_t interface_identifier, int32_t nss_interface_identifier, ecm_db_iface_final_callback_t final, void *arg);
 #endif
+#ifdef ECM_INTERFACE_TUNIPIP6_ENABLE
 void ecm_db_iface_add_tunipip6(struct ecm_db_iface_instance *ii, struct ecm_db_interface_info_tunipip6 *type_info, char *name, int32_t mtu, int32_t interface_identifier, int32_t nss_interface_identifier, ecm_db_iface_final_callback_t final, void *arg);
-
+#endif
 void ecm_db_node_add(struct ecm_db_node_instance *ni, struct ecm_db_iface_instance *ii, uint8_t *address, ecm_db_node_final_callback_t final, void *arg);
 void ecm_db_host_add(struct ecm_db_host_instance *hi, ip_addr_t address, bool on_link, ecm_db_host_final_callback_t final, void *arg);
 void ecm_db_mapping_add(struct ecm_db_mapping_instance *mi, struct ecm_db_host_instance *hi, int port, ecm_db_mapping_final_callback_t final, void *arg);