Workaround for legacy GAP advertising issue on Cordio LL

Due to some issue in Cordio link layer, advertising data does not
take effect unless we set it (or set it again) after advertising
parameters are set.

Author: LDong-Arm

features/FEATURE_BLE/source/generic/GenericGap.tpp

@@ -1424,6 +1424,17 @@ ble_error_t GenericGap<PalGapImpl, PalSecurityManager, ConnectionEventMonitorEve
         return err;
     }
 
+#if defined(TARGET_CORDIO_LL)
+    // TODO: fix advertising set creation in the link layer.
+    // The Cordio link layer implements legacy API on top of extended advertising
+    // and has an issue that no advertising set is created until we set parameters.
+    // As a workaround, set advertising data again to ensure it takes effect.
+    err = setAdvertisingData_(this->_advPayload, this->_scanResponse);
+    if (err) {
+        return err;
+    }
+#endif
+
     err = _pal_gap.advertising_enable(true);
     if (err) {
         return err;