sh: Add DSP registers to regset interface.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/include/asm/ptrace.h b/arch/sh/include/asm/ptrace.h
index bf73646..3ad18e9 100644
--- a/arch/sh/include/asm/ptrace.h
+++ b/arch/sh/include/asm/ptrace.h
@@ -123,6 +123,9 @@
 #define task_pt_regs(task) \
 	((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE \
 		 - sizeof(struct pt_dspregs) - sizeof(unsigned long)) - 1)
+#define task_pt_dspregs(task) \
+	((struct pt_dspregs *) (task_stack_page(task) + THREAD_SIZE \
+		 - sizeof(unsigned long)) - 1)
 #else
 #define task_pt_regs(task) \
 	((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE \