sh: remove EXPEVT vector from stack on sh3/sh4/sh4a

Remove EXPEVT vector from the stack, lookup_exception_vector()
for sh3/sh4/sh4a is already using k2 to get the vector.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
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 12912ab..81c6568 100644
--- a/arch/sh/include/asm/ptrace.h
+++ b/arch/sh/include/asm/ptrace.h
@@ -122,14 +122,12 @@
 #ifdef CONFIG_SH_DSP
 #define task_pt_regs(task) \
 	((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE \
-		 - sizeof(struct pt_dspregs) - sizeof(unsigned long)) - 1)
+		 - sizeof(struct pt_dspregs)) - 1)
 #define task_pt_dspregs(task) \
-	((struct pt_dspregs *) (task_stack_page(task) + THREAD_SIZE \
-		 - sizeof(unsigned long)) - 1)
+	((struct pt_dspregs *) (task_stack_page(task) + THREAD_SIZE) - 1)
 #else
 #define task_pt_regs(task) \
-	((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE \
-		 - sizeof(unsigned long)) - 1)
+	((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1)
 #endif
 
 static inline unsigned long profile_pc(struct pt_regs *regs)