Use correct type for Dbus sensor interface in IPMI sensors YAML files

Dbus sensor interface 'xyz.openbmc_project.Sensor.Value' migrated
from int to double. Therefore all old 'int64_t' types in
"*-ipmi-sensor*.yaml" files for this interface should be changed to
'double'.

(From meta-quanta rev: e48a99450e7c33ddca74cf9aeab4258e38ed1cab)

Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>
Change-Id: I42da4df4e06d22fdd68dae4ab1ab9213908feac8
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>