PLDM: Change rate_unit field to None
PLDM: Change rate_unit field to None

This commit has the change to the rate_unit field
of a numeric effecter for ScheduledHostTransition.
rate_unit was “per second” earlier and TPO epoch time
is sent as seconds so it becomes seconds per second
which doesn't make sense.

Signed-off-by: Pavithra Barithaya <11e7489634b47a21de4c1739cec61358fe3ab503@ibm.com>
Change-Id: I09bec56a2488126103fbd154449bc71f60f6275a

openbmc/pldm,openbmc/pldm,openbmc/pldm