Revert "msm: bam_dmux: fix compilation issue"

This reverts commit 79f83b8a984b18586f2c4e2c141760ed6dc91aea.
Revert "msm: bam_dmux: optimize UL inactivity timeout"

This reverts commit 38d51d7361364348ae9252e72dc9bdf9c82f9d6b.
Revert "Delay UL powerdown if BAM is in polling mode"

This reverts commit 1d15fcd124d85ec373057aa8c8eb3b7c317947e0.