msm: usb_bam : Add QDSS support for usb bam mode

Add USB bam changes to support QDSS in msm-8794.

Main additions:
Support device-tree files.
Add disconnect bam pipe support.
Add new API to retrieve pipe connection: get_bam2bam_connection_info.

Change-Id: I200d44dee319b8a9efda31b238c99202efddaa07
Signed-off-by: Shimrit Malichi <smalichi@codeaurora.org>
7 files changed