[U-Boot] [PATCH] fixing typo error in README file. CPU15 -> CP15

[yeongjun Kim]

It looks typo error. 
Not CPU15, CP15(CoProcessor15)
	
Signed-off-by: yeongjun Kim <iam.yeongjunkim at gmail.com>
---
 README | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README b/README
index 3c3b699..8887cf5 100644
--- a/README
+++ b/README
@@ -4806,7 +4806,7 @@ Low Level (hardware related) configuration options:
 
 - CONFIG_SKIP_LOWLEVEL_INIT_ONLY
 		[ARM926EJ-S only] This allows just the call to lowlevel_init()
-		to be skipped. The normal CPU15 init (such as enabling the
+		to be skipped. The normal CP15 init (such as enabling the
 		instruction cache) is still performed.
 
 - CONFIG_SPL_BUILD
-- 
1.9.1