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

This reverts commit 6c59666fd7f3f81e0d1811e978a792ab90eac32c.

Reason for revert: Broken build 11426448 on git_aosp-main-with-phones on test_suites_arm64-trunk_stagin

Change-Id: Ic37015e232a5ac95ffdf87ac5d928bc6af645bd6
4 files changed