msm: ecm_ipa: add differentiation for EP config

This commit adds a differentiation for EP config based on
the specific tethering protocol.
In case the tethering protocol is ECM this EP will
be configured by A7 drivers.

Change-Id: Ia66f55e075ece5161e0ff976d8b84b46a18e7241
Signed-off-by: Talel Atias <tatias@codeaurora.org>