Patch adds generic way for platform port to extend 
MachineCheckException print-out and adds 44x bus error registers
output. It also removes 40x #ifdefs from show_regs and makes
40x use this new platform extension.
Signed-off-by: Eugene Surovegin <ebs@ebshome.net>
Signed-off-by: Matt Porter <mporter@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>