i5400_edac: Convert it to report memory with the new location

i5400_edac: Convert it to report memory with the new location

On this driver, the memory controller supports only FB-DIMMs.

The memory controller hierarchy here has 3 layers bellow the
memory controller:
	- two branches;
	- each branch has two channels;
	- each channel can select up to 4 DIMM's via the
FB-DIMM AMB (Advanced Memory Buffer) chip.

As EDAC currently limits memory controllers to 2 hierarchy
levels, on this patch, both branches and channels are grouped
together.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>