Fix USB mouse Set_Protocol behavior The QEMU USB mouse claims to support the "boot" protocol (bInterfaceSubClass is 1). However, the mouse rejects the Set_Protocol command. The qemu mouse does support the "boot" protocol specification, so a simple fix is to enable the Set_Protocol request. Signed-off-by: Kevin O'Connor <kevin@koconnor.net> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>