witherspoon hardware and p9 chips have very sensitive requirements for
the cfam-reset. We're seeing power faults with the kernel based cfam
reset due to this.

Could adapt the power application to use the new kernel based cfam reset
interface but there's not a lot to be gained there since the power
application is going away with p10 and this limitation is not present in
p10.
Signed-off-by: NEddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20210308225419.46530-17-eajames@linux.ibm.comSigned-off-by: NJoel Stanley <joel@jms.id.au>