Merge branch 'rmnet-Rewrite-some-existing-functionality'

Subash Abhinov Kasiviswanathan says:

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net: qualcomm: rmnet: Rewrite some existing functionality

This series fixes some of the broken rmnet functionality.
Bridge mode is re-written and made useable and the muxed_ep is converted to hlist.

Patches 1-5 are cleanups in preparation for these changes.
Patch 6 does the hlist conversion.
Patch 7 has the implementation of the rmnet bridge mode.

v1->v2: Fix the warning and code style issue in rmnet_rx_handler as
mentioned by David.
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Signed-off-by: David S. Miller <davem@davemloft.net>