usb: u_bam_dmux: Clean up dead code

Clean up u_bam_dmux driver of code which was used for BAM2BAM
path in older kernels.

Change-Id: Ic998857ec7bbece7fb5c52f249ed9ec663f5037f
Signed-off-by: Ajay Agarwal <ajaya@codeaurora.org>
1 file changed