sound: usb: Provide controller number in QMI response

In order to support tunnel mode on multiple usb conttollers
qmi service needs to provide the controller number in
enable audio stream QMI response so that remote entity
programs appropriate usb controller to initiate data transfer
with USB audio device. Also, update QMI response message data
structure with optional speed_info.

Change-Id: I1d4968c19601a3984bf60e7754a6d88473540166
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>