add wireless toggling in rosalina

https://github.com/AuroraWright/Luma3DS/issues/619#issuecomment-309239178

ligne 353: CFG11_WIFICNT, nothing includes it in rosalina so I hardcoded it here
ligne 363: could also use svc 0x5A (SetWifiEnabled) but not sure how

sysmodules/rosalina/include/menus/miscellaneous.h

@@ -35,5 +35,6 @@ void MiscellaneousMenu_SwitchBoot3dsxTargetTitle(void);
 void MiscellaneousMenu_ChangeMenuCombo(void);
 void MiscellaneousMenu_SaveSettings(void);
 void MiscellaneousMenu_InputRedirection(void);
+void MiscellaneousMenu_ToggleWireless(void);
 void MiscellaneousMenu_PowerOff(void);
 void MiscellaneousMenu_Reboot(void);