Merge changes Iae2db1fb,I2f456623,I9412141b,I2b51e16a,I352da1fc into jb_2.5

* changes:
  msm_fb: display: mdp4 version assigned at board file
  msm_fb: display: add per stage alpha drop detection
  msm_fb: display: remove background invert alpha option for alpha drop pipe
  msm_fb: display: Consolidate commit ioctls
  msm_fb: display: add fput_light to frame buffer