yeah, the
msm8x30-common folder should only be for files and settings that will work on all phones, and the device specific folders would be files and settings needed for the specific phone
at least that is what I was planning on doing, and as I found that certain files and setting would not work on certain phones, move them to the device folders that they did work on
my whole plan was to try and make a tree that would work on multiple phones, so that it would attract more developers, and more people could collaborate on one project and more progress would be made, but it did not seem to attract to many developers, sorry to say