meta-ibm: Change the order of avsbus-disable

Currently avsbus-disable will be executed after power_up to 1.
We found that this will cause power on fail, so avsbus-disable should
be performed before power on.

(From meta-ibm rev: c569a42895ac035837f1508d14903cfea3c5a675)

Change-Id: Ib08573efbb1abf510b2683afd31cd74db9f66a2b
Signed-off-by: Ben Pai <Ben_Pai@wistron.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>