am f3040492: am e93f49b7: am cc9a63db: Add support for specifying the current LCD brightness mode to the backlight driver.

Merge commit 'f30404929e4f44eeb1190d85e1b3794a24b4a5b4'

* commit 'f30404929e4f44eeb1190d85e1b3794a24b4a5b4':
  Add support for specifying the current LCD brightness mode to the backlight driver.