msm_rmnet_bam: Changes to support SMD BAM DMUX.

Changes to support SMD BAM DMUX in kernel 4.9.

This snapshot is taken as of msm-3.18
'commit 9907621a6015 ("cnss2: Remove utils")'.

Fixed minor compilation errors.

Change-Id: I7f48ff358c2686632bf6450c5442b971c16b9b47
Acked-by: Mayank Vishwari <mayankvi@qti.qualcomm.com>
Signed-off-by: Tejaswi Tanikella <tejaswit@codeaurora.org>