EDAC, ghes: use CPER module handles to locate DIMMs

Hi Tyler, 

quoted

Is printing the handle to the kernel log critical?

I don't see why we would need this print. The bank/device print is enough to
map what is shown in dmesg to an SMBIOS entry if that's really needed.

This change is mostly for convenience. I'll revert it since we have two votes
against it now. 

Thanks,
Fan