Signed-off-by: Adam Wujek <dev_public@wujek.eu>

Add:
- fantray command with subcommands (with help and completion):
  - status
  - reset
  - fan
  - load_fw
- i2c-tools as dependency for diot_util
- print detailed information for PSU's (status command)
Signed-off-by: Adam Wujek <dev_public@wujek.eu>

Print:
- version of the DTB
- boot source of uboot
- boot source of uimage
- reset reason
Signed-off-by: Adam Wujek <dev_public@wujek.eu>

added:
BOOT_NEW_FW
UPTIME_SECS
TMR_ERROR_CNT
USE_PEC
Signed-off-by: Adam Wujek <dev_public@wujek.eu>

Add registers to debugfs:
PMBUS_MFR_ID
PMBUS_MFR_MODEL
PMBUS_MFR_REVISION
PMBUS_MFR_LOCATION
PMBUS_MFR_DATE
PMBUS_MFR_SERIAL
PMBUS_IC_DEVICE_REV
Signed-off-by: Adam Wujek <dev_public@wujek.eu>

Note:
PEC is not enabled automatically in monimod.
Signed-off-by: Adam Wujek <dev_public@wujek.eu>

Hartmann PSU returns the wrong value of CAPABILITY (0x1f) register.
It returns 0xff, which include the support for PEC, which is not true
at least for some registers like 0x9A-0x9E.
Signed-off-by: Adam Wujek <dev_public@wujek.eu>

Signed-off-by: Adam Wujek <dev_public@wujek.eu>

Signed-off-by: Adam Wujek <dev_public@wujek.eu>

monimod does not have support for STATUS_FAN_12 and STATUS_FAN_34
Signed-off-by: Adam Wujek <dev_public@wujek.eu>

Move information about I2C channels and addresses into a single diot_util_i2c.h
file.
Signed-off-by: Adam Wujek <dev_public@wujek.eu>