address_translation: Add support for DRAM address mapping 0b1010.

DRAM Address Mapping format 0b1010 supports 4 Gb x8 and 8 Gb x16 devices.

Source: BIOS and Kernel Developer's Guide for AMD Family 10h Processors,
	Table 85.
Merge pull request #1 from vsrinivas/master

address_translation: Add support for DRAM address mapping 0b1010. Thanks to  vsrinivas for the patch