Revert "Disable bfq"

This reverts commit 812e1e3ac50a95eb1f29d125598962c72c52dc08.
Change-Id: I0e10c3f42d8532e1e7ade2ad425f8c8bfb709ef8
Revert "BFQ v7r2"

This reverts commit 0b3d4ac98d9657b3927313a591205861186c17d9.