This patch removes many sparse warnings from the xmon code.  Mostly K&R
function declarations and 0-instead-of-NULLs.  There are still a whole
bunch of warnings in xmon/ppc-opc.c, which is a copy of a file from
binutils.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>