msm7x30: Disable hardware ALS switch

It's not present in the SEMC version of the AS3676 kernel driver

Conflicts:
	BoardConfigCommon.mk

Change-Id: Ic4543c552a96bc96031256411888d5691d2a5289
init.sh: Don't enable button backlight on boot

* Not all devices have button backlight
* We want a consistent experience between all devices

Change-Id: I0b63a3b617df7d7622a3329fa257e25d62b36f73