meta-quanta: olympus-nuvoton: power: update psu inventory over pmbus

According to PMBUS spec, there is an Inventory Information we can update to PSU inventory.

MFR_ID - Manufacturer
MFR_MODEL  - Model
MFR_SERIAL - SerialNumber
IC_DEVICE_ID - PartNumber

redfish/v1/Chassis/chassis/Power
"PowerSupplies": [{
	"@odata.id": "/redfish/v1/Chassis/chassis/Power#/PowerSupplies/0",
	"Manufacturer": "FlexPower",
	"MemberId": "powersupply0",
	"Model": "MIS-S-1020",
	"Name": "powersupply0",
	"PartNumber": "FPS-213-D0000293-101",
	"PowerInputWatts": 104.0,
	"PowerOutputWatts": 61.5,
	"SerialNumber": "MISPS1839A0A0RW",
	"Status": {
		"Health": "OK",
		"State": "Enabled"
	}}],

Tested: Verified for Olympus platform

(From meta-quanta rev: cbb46b95df93a6102ebf18c0bf6105f8f6482451)

Signed-off-by: Joseph Liu <kwliu@nuvoton.com>
Signed-off-by: Tim Lee <timlee660101@gmail.com>
Change-Id: I2714293957919193b36effdaa2c07cb8e6eabda4
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>