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-lenovo rev: 5151dc21b034d829cfd310c778bdb03b1ce3c9e2)

Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>
Change-Id: I3cf17b60c0faf77639f50ce8f26f5004c2ccc25b
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>