satsuma: Remove obsolete ALS configuration

Also set button_backlight current on pre_hw_config.sh to avoid too bright recovery indication.

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: Ia99ae5ed4f8526eb9da1adceab4745a334e2f9c2
Merge "satsuma: Remove obsolete ALS configuration" into jellybean