abox_edge: Remove unused modules to optimize booting time.

DTS changes:
1. Remove unused settings of front camera.
2. Disable unused sensors.
Remove unnecessary debugging information of modules:
1. DVC power down log.
2. sdhci-pxav3 tuning log.
3. Thermal policy log.

Test:
[    3.626789] c2 1 (init) init: init first stage started!

BUG=25579467

Change-Id: Id7e86f709e5adf2d68aa299ec436c17d95b217fb
6 files changed