meta-palmetto: Fix occ hwmon

1. Add openpower-occ-control into build to bind/unbind occ-hwmon driver;
2. Modify hwmon config to use the updated occ-hwmon device.

Change-Id: I5ad0f2b7b95b41ff216381e6689926201930d097
Signed-off-by: Lei YU <mine260309@gmail.com>
3 files changed