usb: qcserial: Add efs sync interface to qcserial

Add EFS Sync interface number to qcserial to provide
generic tty interface to userspace.

Change-Id: Ia856c133c514b640070386aa6d0933439a9f531d
Signed-off-by: Vamsi Krishna <vskrishn@codeaurora.org>
1 file changed