[AS5835-54x] Support psu_fan_dir sysfs for YM-1401A PSU

[jostar-yang]

Signed-off-by: Jostar Yang [email protected]

Because YM-1401A doesn't support psu_fan_dir from pmbus. Read from command = 0xC3 in pmbus that will always get "F2B". But YM-10401A has F2B and B2F PSU. So read PSU fan dir from psu eerpm and add psu_fan_dir sysfs. YM-1401ABR is F2B and YM-1401ACR is B2B.

Test log as below,
(YM-1401ABR)
cat /sys/bus/i2c/devices/12-0053/psu_fan_dir
F2B
onlpdump log as below,
.............
{
Description: PSU 2 - Fan 1
Status: 0x00000009 [ PRESENT,F2B ]
Caps: 0x00000038 [ SET_PERCENTAGE,GET_RPM,GET_PERCENTAGE ]
RPM: 3200
Per: 14
Model: NULL
SN: NULL

( YM-1401ACR)
/sys/bus/i2c/devices/12-0053/psu_fan_dir
B2F
onlpdump log as below,
Description: PSU-1
Model: YM-1401ACR
SN: SA040W261837000030
Status: 0x00000001 [ PRESENT ]
Caps: 0x00000151 [ AC,VOUT,IOUT,POUT ]
Vin: 0
Vout: 11841
Iin: 0
Iout: 3972
Pin: 0
Pout: 44000
fan @ 6 = {
Description: PSU 1 - Fan 1
Status: 0x00000005 [ PRESENT,B2F ]
..............

[ideaship]

With these changes, onlpdump now shows the expected output for the PSU fan direction.