msm: HTC: 8960: clean up regulator references

Change-Id: I85dfb1a561690404147d317abbf6c505c22755c6
msm: HTC: 8960: clean up panel debugging

* Use pr_err, pr_info
* Due to the way the backlight works, the backlight debugging is very
  noisy, remove it.

Change-Id: I353213a972ba4daf73f8d19af963eeed74db1aac
Merge branch 'cm-10.2' of github.com:CyanogenMod/android_kernel_htc_msm8960 into jb-devel-mr2-release