Addressed comments from: - Rob: http://www.spinics.net/lists/devicetree/msg196376.html
Changes since previous update: - Moved all memory mapped nodes to busses. - Map ranges starting at 0 - Moved external clocks to root - No changes to mach-npcm since v5 - No changes to MAINTAINERS since v5 Changes have been tested on the NPCM750 evaluation board.

