variants: Wio WM1110: Use common implementation of startOTAUpdate()

Signed-off-by: Frieder Schrempf <frieder@fris.de>

variants/wio_wm1110/WioWM1110Board.h

@@ -11,8 +11,9 @@
 #endif
 #define Serial Serial1
 
-class WioWM1110Board : public NRF52BoardDCDC {
+class WioWM1110Board : public NRF52BoardDCDC, public NRF52BoardOTA {
 public:
+  WioWM1110Board() : NRF52BoardOTA("WM1110_OTA") {}
   void begin();
 
 #if defined(LED_GREEN)
@@ -37,8 +38,6 @@ public:
     return "Seeed Wio WM1110";
   }
 
-  bool startOTAUpdate(const char* id, char reply[]) override;
-
   void enableSensorPower(bool enable) {
     digitalWrite(SENSOR_POWER_PIN, enable ? HIGH : LOW);
     if (enable) {