qcom-common: Setup mk files to honor the 8974 devices.

Change-Id: I115a7b6294b5c07b97a646b1cc71e8890eee5701
Add ffmpeg codecs to 8974

Change-Id: Iadf66a00a742ab37b68195c8bb048e1d4457f523
Merge branch "cm-11.0" into kylin