sound: usb: Add support to handle QMI client disconnect

In case of remote QMI client restart, QMI client disconnect
is notified to qmi server. Handle this notification by going
over all the active usb audio devices and issue set alt 0
on corresponding active interfaces of device. After this
perform usb audio device clean up to unmap iova.

Change-Id: Ie89b06d821c1f968ecc30333654bc3a1466f74e3
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>