Revert "mach-ux500/prcmu-qos-power: disable APE/DDR boost at freq > 400MHz"

This reverts commit b222c07155faac4f32585f5e63681cf10087abc6.
Revert "test for golden"

This reverts commit 726c14f77232fde2411e4036f595d3f5c75eb7b7.