Revert "phb4: Read PERST signal rather than assuming it's asserted"
Revert "phb4: Read PERST signal rather than assuming it's asserted"

This reverts commit b42ff2b904165addf32e77679cebb94a08086966

The original patch assumes that PERST has been asserted well before (>
250ms) we hit here (ie. during hostboot).

In a subesquent patch this will no longer be the case as we need to
assert PERST during PHB reset, which may only be a few milliseconds
before we hit this code.

Hence revert this patch. Go back to the software mechanism using
skip_perst to determine if PERST should be asserted or not. This
allows us to keep the speed optimisation on boot.

Signed-off-by: Michael Neuling <7b0ab45a730e48a69239010b5b8fe5fa4e8eaac6@neuling.org>
Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.vnet.ibm.com>

legoater/skiboot,shenki/skiboot,open-power/skiboot,stewart-ibm/skiboot,legoater/skiboot,qemu/skiboot,shenki/skiboot,qemu/skiboot,open-power/skiboot,qemu/skiboot,stewart-ibm/skiboot,mikey/skiboot,open-power/skiboot,shenki/skiboot,legoater/skiboot,mikey/skiboot,stewart-ibm/skiboot,open-power/skiboot,qemu/skiboot,legoater/skiboot,shenki/skiboot,mikey/skiboot,shenki/skiboot,legoater/skiboot,open-power/skiboot,qemu/skiboot