net: ethernet: Add snapshot of RMNET BAM driver

This change adds RMNET BAM driver which provides RMNET virtual ethernet
interface for routing IP packets.

This snapshot is taken as of msm-3.18 'commit cd0018e74c9e ("qseecom:
Backport qseecom listener changes to kernel-3.18")'.

This change also fixes different coding style related warnings.

Change-Id: Id07b2b550b20d47ccce6decafffec02edcb510e4
Signed-off-by: Sudharsan Reddy Yettapu <syepattu@codeaurora.org>
Signed-off-by: Sivasri Kumar Vanka <sivasri@codeaurora.org>