This flag was being mostly used as a meta flag in some
cases and not covering other cases.

One of the risks is that it was masking some frontbuffer
trackings without disabling PSR.

So, better to kill this at once and avoid umbrella parameters.
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: NChris Wilson <chris@chris-wilson.co.uk>
[danvet: Drop unused out: label to appease gcc.]
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>