MIPS: Idle: Don't call local_irq_disable() in cpu_wait() implementations.

The generic idle loop has already disabled interrupts so this is redundant.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/idle.c b/arch/mips/kernel/idle.c
index 78cc7d6..1f85dda 100644
--- a/arch/mips/kernel/idle.c
+++ b/arch/mips/kernel/idle.c
@@ -39,7 +39,6 @@
 
 static void r39xx_wait(void)
 {
-	local_irq_disable();
 	if (!need_resched())
 		write_c0_conf(read_c0_conf() | TX39_CONF_HALT);
 	local_irq_enable();
@@ -56,7 +55,6 @@
  */
 void r4k_wait_irqoff(void)
 {
-	local_irq_disable();
 	if (!need_resched())
 		__asm__(
 		"	.set	push		\n"
@@ -75,7 +73,6 @@
  */
 static void rm7k_wait_irqoff(void)
 {
-	local_irq_disable();
 	if (!need_resched())
 		__asm__(
 		"	.set	push					\n"