MN10300: Create generic kernel debugger hooks

Create generic kernel debugger hooks in the MN10300 arch and make gdbstub use
them.  This is a preparation for KGDB support.

Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/arch/mn10300/kernel/internal.h b/arch/mn10300/kernel/internal.h
index ea94661..a5ac755 100644
--- a/arch/mn10300/kernel/internal.h
+++ b/arch/mn10300/kernel/internal.h
@@ -30,6 +30,13 @@
 #endif
 
 /*
+ * smp.c
+ */
+#ifdef CONFIG_SMP
+extern void smp_jump_to_debugger(void);
+#endif
+
+/*
  * time.c
  */
 extern irqreturn_t local_timer_interrupt(void);