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/SinglePortModule.h

@@ -26,7 +26,7 @@ class SinglePortModule : public MeshModule
     /**
      * Return a mesh packet which has been preinited as a data packet with a particular port number.
      * You can then send this packet (after customizing any of the payload fields you might need) with
-     * service.sendToMesh()
+     * service->sendToMesh()
      */
     meshtastic_MeshPacket *allocDataPacket()
     {
@@ -36,4 +36,4 @@ class SinglePortModule : public MeshModule
 
         return p;
     }
-};
+};