Lack of argument decls causes this warning:

arch/i386/mach-generic/../mach-es7000/es7000plat.c:53: warning: function declaration isn't a prototype

Let's stick the extern declaration in a header, which is where they always
should be.

Cc: "Brown, Len" <len.brown@intel.com>
Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>