Revert^2 "Enable [vzext|vsext].vf[8|4|2] instructions"

This reverts commit 1bcd5b52b2a37f15d8f0bb96bcffd617cd189cb8.

Reason for revert: Should work now

Change-Id: I834fef1449168fc2e9ecbd315ba54dacb9b9e164
4 files changed