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-inspur rev: 608bb59eb418c6918135651895e2b994c715126d)

Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>
Change-Id: I4610bc0b6dcff78b31c8ae7973da82aac85a456f
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>