[PATCH] stop_machine.c copyright

I had to look back: this code was extracted from the module.c code in 2005.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/stop_machine.c

+/* Copyright 2005 Rusty Russell rusty@rustcorp.com.au IBM Corporation.
+ * GPL v2 and any later version.
+ */
 #include <linux/stop_machine.h>
 #include <linux/kthread.h>
 #include <linux/sched.h>