USB-VCP no OFF if internal RF module is set to CRSF (#1957)

* Do not list OFF on VCP menu if internal RF module is set to CRSF to allow pass-through flashing.
Set USB-VCP automatically to CLI when CRSF mode is selected for internal module and it was previously OFF. Activate CLI when iCRSF is selected.

* Companion part

Co-authored-by: elecpower <neilh713@tpg.com.au>

radio/src/gui/common/stdlcd/radio_hardware.cpp

@@ -532,6 +532,11 @@ void menuRadioHardware(event_t event)
           memclear(&g_model.moduleData[INTERNAL_MODULE], sizeof(ModuleData));
           storageDirty(EE_MODEL);
           storageDirty(EE_GENERAL);
+        #if defined(CROSSFIRE) && defined(USB_SERIAL)
+          // If USB-VCP was off, set it to CLI to enable passthrough flashing
+          if (isInternalModuleCrossfire() && serialGetMode(SP_VCP) ==  UART_MODE_NONE)
+            serialSetMode(SP_VCP, UART_MODE_CLI);
+        #endif
         }
       } break;
 #endif