[coreboot] [PATCH 3/6] Intel EP80579 northbridge

[Ed Swierk]

This patch implements support for the memory controller and PCIe
interface of the Intel EP80579 Integrated Processor. The memory
controller code supports only 64-bit-wide DIMMs with x8 devices and
ECC. It has been tested on a development board using a single Micron
MT9HTF6472PY-667D2 DIMM. Your mileage will definitely vary with other
DIMMs.

Signed-off-by: Ed Swierk