tmnxChassisPowerSupplyAssignedDCType when set to `m48-dc`, the power supply
is -48V DC, when set to P24-dc it is +24V DC. tmnxChassisPowerSupplyAssignedDCType
is set to m48-dc or p24-dc if tmnxChassisPowerSupplyAssignedType is of type `dc`,
If tmnxChassisPowerSupplyAssignedType is not `dc` tmnxChassisPowerSupplyAssignedDCType
will be set to not-applicable.