Change wiimote reconnect on button press code

This moves the reconnect logic into a single function, so the netplay code doesn't need to be written 2 times

Source/Core/Core/HW/Wiimote.h

@@ -76,6 +76,7 @@ ControllerEmu::ControlGroup* GetTurntableGroup(int number, WiimoteEmu::Turntable
 
 void ControlChannel(int number, u16 channel_id, const void* data, u32 size);
 void InterruptChannel(int number, u16 channel_id, const void* data, u32 size);
+bool ButtonPressed(int number);
 void Update(int number, bool connected);
 }