What we want to assert based on the conditions required by Bspec is that
power well 2 is disabled, so no need to check for other power wells.
In addition we can only check if the driver's request is removed, the
actual state depends on whether the other request bits are set or not
(BIOS, KVMR, DEBU
"Disable all display engine functions using the full mode set disable
sequence on all pipes, transcoders, ports, planes, and power well 2
(PG2)."
I hope at this point we really already did all the rest besides the PG2.
Anyways I believe this patch itself makes total sense so:
Reviewed-by: Rodrig
