FHSS and Mac extension enable update.

Return error if FHSS or mac extension are enabled and RF driver
extensions are not supported.

Author: Juha Heiskanen

source/MAC/IEEE802_15_4/sw_mac.c

@@ -165,6 +165,11 @@ int ns_sw_mac_fhss_register(mac_api_t *mac_api, fhss_api_t *fhss_api)
     if (!mac_setup) {
         return -2;
     }
+
+    if (!mac_setup->rf_csma_extension_supported) {
+        return -2;
+    }
+
     // Assign FHSS API
     mac_setup->fhss_api = fhss_api;
     // Pass MAC functions to FHSS
@@ -235,8 +240,13 @@ static int8_t ns_sw_mac_api_enable_mcps_ext(mac_api_t *api, mcps_data_indication
     if(api != mac_store.mac_api ){
         return -1;
     }
+
     mac_api_t *cur = mac_store.mac_api;
 
+    if (!mac_store.setup->rf_csma_extension_supported) {
+        return -1;
+    }
+
     cur->data_conf_ext_cb = data_cnf_cb;
     cur->data_ind_ext_cb = data_ind_cb;
     if (data_cnf_cb && data_ind_cb) {