exhilarate: Clean up Samsung device inheritance

* Remove init.qcom.usb.sh
* Move torch  up to msm8660-common
* Move common items from device to celox-common
* Use nested cm.dependencies
* Move common system properties to celox-common, msm8660-common

Change-Id: I4d0926e9e5897a4da1e6c881b8502f45e4463669