[qca-nss-ecm] ifdef'd all the SIT (6RD) code.

* This will make it easy to remove SIT (6RD) code from the compilation.

Change-Id: Id0b8d75e220feea7d0b20cb4c17e823ac1463914
Signed-off-by: Murat Sezgin <msezgin@codeaurora.org>
diff --git a/ecm_db.h b/ecm_db.h
index 60824d8..9e99e8b 100644
--- a/ecm_db.h
+++ b/ecm_db.h
@@ -138,7 +138,9 @@
 #endif
 struct ecm_db_iface_instance *ecm_db_iface_find_and_ref_loopback(uint32_t os_specific_ident);
 struct ecm_db_iface_instance *ecm_db_iface_find_and_ref_ipsec_tunnel(uint32_t os_specific_ident);
+#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
 struct ecm_db_iface_instance *ecm_db_iface_find_and_ref_tunipip6(ip_addr_t saddr, ip_addr_t daddr);
 
 struct ecm_db_node_instance *ecm_db_node_find_and_ref(uint8_t *address);
@@ -227,8 +229,10 @@
 void ecm_db_iface_add_unknown(struct ecm_db_iface_instance *ii, uint32_t os_specific_ident, char *name, int32_t mtu, int32_t interface_identifier, int32_t nss_interface_identifier, ecm_db_iface_final_callback_t final, void *arg);
 void ecm_db_iface_add_loopback(struct ecm_db_iface_instance *ii, uint32_t os_specific_ident, char *name, int32_t mtu, int32_t interface_identifier, int32_t nss_interface_identifier, ecm_db_iface_final_callback_t final, void *arg);
 void ecm_db_iface_add_ipsec_tunnel(struct ecm_db_iface_instance *ii, uint32_t os_specific_ident, char *name, int32_t mtu, int32_t interface_identifier, int32_t nss_interface_identifier, ecm_db_iface_final_callback_t final, void *arg);
+#ifdef ECM_INTERFACE_SIT_ENABLE
 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
 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);
 
 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);