sh: stacktrace/lockdep/irqflags tracing support.

Wire up all of the essentials for lockdep..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/kernel/cpu/sh3/entry.S

@@ -140,7 +140,7 @@ call_dpf:
 	mov.l	1f, r0
  	mov.l	@r0, r6		! address
 	mov.l	3f, r0
-	sti
+
 	jmp	@r0
  	 mov	r15, r4		! regs