meta-quanta: gbs: stop hwmon while doing tray reset

Stop phosphor-hwmon before performing a tray power cycle to
avoid ADM1272 doing an abnormal I2C transaction and causing
ADM1272 driver probe to fail due to wrong Manufacturer ID.

Signed-off-by: George Hung <george.hung@quantatw.com>
Change-Id: I040aa1660e1bfe98f0979c0930b2658b5d0a6228
1 file changed