meta-ampere: mtjade: Add on-board sensors

Support for Mt. Jade on-board sensors including fans, battery, PSUs,
voltage and temperature sensors.

Tested: check sensor reading from WebUI. All on-board sensors are
displayed with reasonable values.

Signed-off-by: Thu Nguyen <thu@os.amperecomputing.com>
Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Change-Id: I60abc8ae946ef95c09903ebc5d95d15db6161c1a
13 files changed