This patch adds new machine definitions for the iMac G5 and the new single
processor PowerMac G5.  It also slightly updates the existing definitions.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>