Revert "f2fs: partially revert last commit"

This reverts commit f5e24da85cdafcb0beedd9e8793b1a09f4891f44.
Revert "f2fs: backport performance improvements"

This reverts commit eac44b753435855ab4611179ff0bd362a6efd362.
Revert "msm: acpuclock: disable vdd for now"

This reverts commit baef5f591006905658be438fe796a15de2da07e3.
Revert "msm: acpuclock: tweak for pink"

This reverts commit 31427603d7f6d737449ce75fa94c0c8285a3b777.
Revert "msm: acpuclock: lower voltages just a bit"

This reverts commit 57692302be8989c120776caaa4fad957f23f995b.
Revert "msm: add userspace undervolting interface"

This reverts commit 2565da739625cf284d2a93cb6d77240352bbe5e1.