[Edgecore][as4224/as4564] Modify fan driver to support sensors command

[brandonchuang]

Currently, fan information is not shown with the 'sensors' command. This patch will migrate the fan folder under 'hwmon', so that sensors can detect the fan and display its information.

sensors output: as4224_fan-isa-0000 Adapter: ISA adapter fan1: 8587 RPM (min = 0 RPM, max = 20500 RPM) fan2: 8667 RPM (min = 0 RPM, max = 20500 RPM) fan3: 8667 RPM (min = 0 RPM, max = 20500 RPM) fan4: 8587 RPM (min = 0 RPM, max = 20500 RPM) fan5: 8746 RPM (min = 0 RPM, max = 20500 RPM) fan6: 8746 RPM (min = 0 RPM, max = 20500 RPM)

as4564_fan-isa-0000 Adapter: ISA adapter fan1: 1470 RPM (min = 0 RPM, max = 10670 RPM) fan2: 1510 RPM (min = 0 RPM, max = 10670 RPM)

Changes are listed below:

• Add min/max fan attributes
• Create sysfs attributes under hwmon folder
• Modify fani.c/sysi.c accordingly

Signed-off-by: Brandon Chuang brandon_chuang@edge-core.com