hw/ipmmi: Disable watchdog on final reset
hw/ipmmi: Disable watchdog on final reset

Rather than doing the last disable in the interrupt path, do it on final
reset. This is a temporary workaround for incorrect pretimeout
behaviour.

Signed-off-by: Jeremy Kerr <68a658b44bbaefab3ef5cd231967195fc0ff9d69@ozlabs.org>

jk-ozlabs/skiboot,shenki/skiboot,stewart-ibm/skiboot,legoater/skiboot,jk-ozlabs/skiboot,legoater/skiboot,legoater/skiboot,shenki/skiboot,jk-ozlabs/skiboot,qemu/skiboot,qemu/skiboot,ddstreet/skiboot,shenki/skiboot,mikey/skiboot,mikey/skiboot,qemu/skiboot,shenki/skiboot,ddstreet/skiboot,cyrilbur-ibm/skiboot,stewart-ibm/skiboot,csmart/skiboot,open-power/skiboot,cyrilbur-ibm/skiboot,apopple/skiboot,apopple/skiboot,csmart/skiboot,mikey/skiboot,legoater/skiboot,apopple/skiboot,csmart/skiboot,open-power/skiboot,shenki/skiboot,stewart-ibm/skiboot,open-power/skiboot,legoater/skiboot,open-power/skiboot,ddstreet/skiboot,cyrilbur-ibm/skiboot,open-power/skiboot,qemu/skiboot,qemu/skiboot