dctl: p9 increase thread quiesce timeout
dctl: p9 increase thread quiesce timeout

We require all instructions to be completed before a thread is
considered stopped, by the dctl interface. Long running instructions
like cache misses and CI loads may take a significant amount of time
to complete, and timeouts have been observed in stress testing.

Increase the timeout significantly, to cover this. The workbook
just says to poll, but we like to have timeouts to avoid getting
stuck in firmware.

Signed-off-by: Nicholas Piggin <24829078df5003d9dd1dd871ca2aeb0b1cf95ef4@gmail.com>
Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.vnet.ibm.com>

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