bebob: Send a cue to load firmware for M-Audio Firewire series

This commit is optional. The purpose of this commit is to help testers.

Just powering on, these devices below wait to download firmware.
 - Firewire Audiophile
 - Firewire 410
 - Firewire 1814
 - ProjectMix I/O

But firmware version 5058 or later, flash memory in the device stores the
firmware. So this driver can enable these devices by sending a certain cue to
load the firmware.

I think this functionality should be implemented in user-land. FFADO already
have 'ffado-bridgeco-downloader' to take the device to download firmware. To
read these codes, this cue is a kind of Bootloader Commands. The role of this
cue is to initialize configuration to factory settings