x86: Convert from ACCESS_ONCE to READ/WRITE_ONCE

In order to update our <linux/compiler.h> to a newer version that no
longer provides ACCESS_ONCE() but only READ_ONCE()/WRITE_ONCE() we need
to convert arch/x86/include/asm/atomic.h to the other macros.

Cc: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h
index 4ca0f79..14f811f 100644
--- a/arch/x86/include/asm/atomic.h
+++ b/arch/x86/include/asm/atomic.h
@@ -23,7 +23,7 @@
  */
 static inline int atomic_read(const atomic_t *v)
 {
-	return ACCESS_ONCE((v)->counter);
+	return READ_ONCE((v)->counter);
 }
 
 /**