ARM: start.S: fix typo

Fix typo in comment about position of 'A' bit in several start.S.

Signed-off-by: Yuichiro Goto <goto.yuichiro@espark.co.jp>
diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S
index 4c0ab4d..a602d4e 100644
--- a/arch/arm/cpu/arm1176/start.S
+++ b/arch/arm/cpu/arm1176/start.S
@@ -78,7 +78,7 @@
 	mrc	p15, 0, r0, c1, c0, 0
 	bic	r0, r0, #0x00002300	@ clear bits 13, 9:8 (--V- --RS)
 	bic	r0, r0, #0x00000087	@ clear bits 7, 2:0 (B--- -CAM)
-	orr	r0, r0, #0x00000002	@ set bit 2 (A) Align
+	orr	r0, r0, #0x00000002	@ set bit 1 (A) Align
 	orr	r0, r0, #0x00001000	@ set bit 12 (I) I-Cache
 
 	/* Prepare to disable the MMU */