* USB runtime options moved to a new dynamic menu
* USB host controllers create own submenus in init()
* USB runtime parameter handlers simplified
* TODO: related changes in the wx and win32dialog code
keyboard and usb_hid code to use them
- removed keyboard handling from the USB host controller code
- removed no longer needed USB stubs from the devices code
- converted removable mouse variables to a structure
- some more registers converted from struct to Bit16u / Bit32u
- some progress with save/restore support
- small interrupt handling rewrite
- report misaligned read/write access
- initialize device pointers in init()
- only connect devices in reset() if not NULL
- don't delete devices in reset_hc() to avoid segfault (update connect status
instead)
- fixed port number calculation in read handler
- fixed enabling interrupts
is already done in reset()
- init_device(): check for device connected to port before creating a new one
(OHCI and UHCI)
- update irq level after clearing status and masking interrupt (same behaviour
as the Qemu implementation)
