Add hwmon0 config in Palmetto.py and Barreleye.py

Both Palmetto.py and Barreleye are missing hwmon0 in HWMON_CONFIG,
which results in `Unhandled hwmon` warning log flood.
Add hwmon0's config (i2c 0-0068 for RTC ds3231's temperature) to fix the
issue.

Resolves openbmc/openbmc#608

Change-Id: Ief6a13e2cec64fbc25348c715d81bf1e2f1f5564
Signed-off-by: Lei YU <mine260309@gmail.com>
2 files changed