Merge changes I05a7d9c4,Ib568df71,Ibd79e983 into msm-3.0

* changes:
  msm: bam_dmux: Prevent UL Powerdown due to modem flow control
  msm: bam_dmux: cleanup ioremap_nocache() handle during error handling
  msm: bam_dmux: extend tx list lock around sps_transfer_one()