Make SPI frequency and TOPHONE queue size configurable on Native (#4369)

* Make SPI frequency configurable on Native

* Make the tophone queue size configurable for Portduino

* The modified SPISettings must be configured in setup(), after config.yaml is processed

* make MeshService a pointer, so we can configure MAX_RX_TOPHONE at run time

* Got a little over excited with refactoring

* Silence a warning

src/mesh/MeshModule.cpp

@@ -170,7 +170,7 @@ void MeshModule::callModules(meshtastic_MeshPacket &mp, RxSource src)
     if (isDecoded && mp.decoded.want_response && toUs) {
         if (currentReply) {
             printPacket("Sending response", currentReply);
-            service.sendToMesh(currentReply);
+            service->sendToMesh(currentReply);
             currentReply = NULL;
         } else if (mp.from != ourNodeNum && !ignoreRequest) {
             // Note: if the message started with the local node or a module asked to ignore the request, we don't want to send a