plat/arm: Fix misra warnings in platform code

Change-Id: Ica944acc474a099219d50b041cfaeabd4f3d362f
Signed-off-by: Sathees Balya <sathees.balya@arm.com>
diff --git a/plat/arm/board/fvp/fvp_security.c b/plat/arm/board/fvp/fvp_security.c
index a6c9227..028522c 100644
--- a/plat/arm/board/fvp/fvp_security.c
+++ b/plat/arm/board/fvp/fvp_security.c
@@ -21,6 +21,6 @@
 	 * configurations, those would be configured here.
 	 */
 
-	if (get_arm_config()->flags & ARM_CONFIG_HAS_TZC)
+	if ((get_arm_config()->flags & ARM_CONFIG_HAS_TZC) != 0U)
 		arm_tzc400_setup(NULL);
 }