Revert "shamu: add DSP library"

This reverts commit bfe0c8d4524ff3b71722f79e054ed8c94ee60334.

Change-Id: Ibcaca79e2b17d9f1012ff2d3b57a5dd20ba0f9a0
Merge "Revert "shamu: add DSP library"" into lp5.0