net: qualcomm: rmnet: Implement bridge mode

Add support to bridge two devices which can send multiplexing and
aggregation (MAP) data. This is done only when the data itself is
not going to be consumed in the stack but is being passed on to a
different endpoint. This is mainly used for testing.

CRs-Fixed: 2156182
Change-Id: I1ccb890c7f1cb3047c3448d3d42fc4165399c37c
Signed-off-by: David S. Miller <davem@davemloft.net>
Git-commit: 60d58f971c1077a0f2467b2d5bc38058df43a819
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>