mn10300: Use common threadinfo allocator

Let the core code allocate and handle the kgdb cleanup with the
arch_release_thread_info() function.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: David Howells <dhowells@redhat.com>
Link: http://lkml.kernel.org/r/20120505150141.996582377@linutronix.de
diff --git a/arch/mn10300/kernel/kgdb.c b/arch/mn10300/kernel/kgdb.c
index f6c981d..9977082 100644
--- a/arch/mn10300/kernel/kgdb.c
+++ b/arch/mn10300/kernel/kgdb.c
@@ -397,7 +397,7 @@
  * single-step state is cleared.  At this point the breakpoints should have
  * been removed by __switch_to().
  */
-void free_thread_info(struct thread_info *ti)
+void arch_release_thread_info(struct thread_info *ti)
 {
 	if (kgdb_sstep_thread == ti) {
 		kgdb_sstep_thread = NULL;
@@ -407,7 +407,6 @@
 		 * so force immediate reentry */
 		kgdb_breakpoint();
 	}
-	kfree(ti);
 }
 
 /*