* fix for RPI Picow

variants/rpi_picow/PicoWBoard.h

@@ -2,6 +2,7 @@
 
 #include <MeshCore.h>
 #include <Arduino.h>
+#include <helpers/KeyValueStore.h>
 
 // built-ins
 #define  PIN_VBAT_READ    26
@@ -16,6 +17,8 @@ public:
   void begin();
   uint8_t getStartupReason() const override { return startup_reason; }
 
+  void attachDynamicPrefs(KeyValueStore* prefs) { }  // no-op
+
   void onBeforeTransmit() override {
     digitalWrite(LED_BUILTIN, HIGH);   // turn TX LED on
   }