wspoon: Add IR35221 hwmon I/V/P monitoring

Add the current, voltage, and power hwmon config file
entries for the 4 IR35221 voltage regulator instances.

Change-Id: Ia7c47e47454429bd528076de307cd3238f8577f2
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
4 files changed