Refactor extract files for qcom-common

Change-Id: I28bf3c11bc379649c014da4b10ca565ab33c673d
Add build barrier to include only msm8960-common devices

Change-Id: I827ed209b560dc6efb73416b1aa2e07b9a541cf4
Refactor for qcom-common

Change-Id: Idcb5fed5ebb17aec1bbbe480f2aa8c3eb5b466d5