Revert "p705: enable exfat support and enable bfqv7 by default"

This reverts commit 87aae6b587e9a862205d9fea3c64475082369915.
Revert "block: bfq: Squashed update from v6r2 to v7"

This reverts commit bb69abbc9de1043e37a4123ec2d4e2a26e638dc9.
Revert "block: cgroups, kconfig, build bits for BFQ-v6r2-3.4"

This reverts commit 922d92837dcd33ab5b17d9a507d19838eae0441e.
Revert "block, bfq: add Early Queue Merge (EQM) to BFQ-v6r2 for 3.4.0"

This reverts commit 3228623df6b1fec3e20828cbab348276e0805796.
Revert "block: introduce the BFQ-v6r2 I/O sched for 3.4"

This reverts commit 65bde1aea3f82278bffb6b0739328118606c23ed.
upd