fix recursive call

Author: paul-szczepanek-arm

features/FEATURE_BLE/ble/pal/PalGap.h

@@ -655,7 +655,7 @@ struct Gap {
         periodic_advertising_interval_t periodic_advertising_max,
         bool advertise_power
     ) {
-        return impl()->set_periodic_advertising_parameters(
+        return impl()->set_periodic_advertising_parameters_(
             advertising_handle,
             periodic_advertising_min,
             periodic_advertising_max,