Fix MISRA rule 8.4 Part 2

Rule 8.4: A compatible declaration shall be visible when
          an object or function with external linkage is defined

Fixed for:
	make DEBUG=1 PLAT=juno LOG_LEVEL=50 all

Change-Id: Ic8f611da734f356566e8208053296e6c62b54709
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>
diff --git a/plat/arm/css/common/css_bl1_setup.c b/plat/arm/css/common/css_bl1_setup.c
index 7a2a6ff..b1b275c 100644
--- a/plat/arm/css/common/css_bl1_setup.c
+++ b/plat/arm/css/common/css_bl1_setup.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -7,6 +7,7 @@
 #include <bl_common.h>
 #include <debug.h>
 #include <plat_arm.h>
+#include <platform.h>
 #include <soc_css.h>
 
 void bl1_platform_setup(void)