as3525v2-usb: rework ep listing&xfers cancelling, implement speed reporting, first try at implementing disconnection

There is still a problem after the set address request which makes the driver working randomly.
I still didn't manage do get a proper disconnect interrupt.
From time to time, when unplugging cable, neither rockbox nor usb driver reports disconnect even.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27161 a1c6a512-1295-4272-9138-f99709370657
1 file changed