Promotion of fm.lnx.2.1-00021.

CRs      Change ID                                   Subject
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1090583   Ie12eedd1c3bab9650804c6f2bc1037b3c3d0e436   Add support for signal blending

Change-Id: Ibea7e8653eba1f3ecd7dbd30b6cf6a6c817cfd97
CRs-Fixed: 1090583