msm: teth_bridge + usb: add differentiation for EP config

Adds support for not configuring the IPA endpoint.
This functionality is needed by the IPA driver in
order to support sys2bam on the UL.

Adds a differentiation for endpoint config based on the
specific tethering protocol.
In case the tethering protocol is MBIM/RMNET the endpoint
will not be configured by A7 drivers.

Change-Id: Iaf4b6bc26b8b4d10fc5b0f900b7034dfc4933fcd
Signed-off-by: Talel Atias <tatias@codeaurora.org>
Signed-off-by: Dov Levenglick <dovl@codeaurora.org>
Signed-off-by: Gidon Studinski <gidons@codeaurora.org>