powerpc: Use CURRENT_THREAD_INFO instead of open coded assembly

Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/idle_e500.S b/arch/powerpc/kernel/idle_e500.S
index 4f0ab85..1544866 100644
--- a/arch/powerpc/kernel/idle_e500.S
+++ b/arch/powerpc/kernel/idle_e500.S
@@ -21,7 +21,7 @@
 	.text
 
 _GLOBAL(e500_idle)
-	rlwinm	r3,r1,0,0,31-THREAD_SHIFT	/* current thread_info */
+	CURRENT_THREAD_INFO(r3, r1)
 	lwz	r4,TI_LOCAL_FLAGS(r3)	/* set napping bit */
 	ori	r4,r4,_TLF_NAPPING	/* so when we take an exception */
 	stw	r4,TI_LOCAL_FLAGS(r3)	/* it will return to our caller */
@@ -96,7 +96,7 @@
 	stw	r9,_NIP(r11)		/* make it do a blr */
 
 #ifdef CONFIG_SMP
-	rlwinm	r12,r1,0,0,31-THREAD_SHIFT
+	CURRENT_THREAD_INFO(r12, r1)
 	lwz	r11,TI_CPU(r12)		/* get cpu number * 4 */
 	slwi	r11,r11,2
 #else