hdd: make speed preset configurable

This includes settings UI for Qt

src/qt/qt_harddrive_common.hpp

@@ -10,6 +10,7 @@ namespace Harddrives {
     void populateBuses(QAbstractItemModel* model);
     void populateRemovableBuses(QAbstractItemModel* model);
     void populateBusChannels(QAbstractItemModel* model, int bus);
+    void populateSpeeds(QAbstractItemModel* model, int bus);
     QString BusChannelName(uint8_t bus, uint8_t channel);
     inline SettingsBusTracking* busTrackClass = nullptr;
 };