Q: Which is used the 855pm or the i855pm code?

I am walking through the code converting the sizeram() functions
and have run across a duplicate 855pm and the i855pm.

The digitallogic/adl855pc is using the i855pm, so that appears
to be the active one.

Is there a reason we have two of these?  If not can we just delete
src/northbridge/intel/855pm?

Eric