arm: fsl: csu: Reduce size of ns_dev

None of the values in this struct are larger than 256, so we can reduce
the members to u8s. This saves around 1K.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/include/fsl_csu.h b/include/fsl_csu.h
index 0e59ac3..40c2968 100644
--- a/include/fsl_csu.h
+++ b/include/fsl_csu.h
@@ -24,8 +24,8 @@
 };
 
 struct csu_ns_dev {
-	unsigned long ind;
-	uint32_t val;
+	u8 ind;
+	u8 val;
 };
 
 void enable_layerscape_ns_access(void);