Dynamic cfg: MISRA fixes

Change-Id: I1d85b76af002b8b672fcaeca94939b7420bc8243
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
diff --git a/plat/common/plat_bl1_common.c b/plat/common/plat_bl1_common.c
index a197262..4b1f233 100644
--- a/plat/common/plat_bl1_common.c
+++ b/plat/common/plat_bl1_common.c
@@ -89,7 +89,7 @@
 
 	/* Get the image descriptor */
 	image_desc = bl1_plat_get_image_desc(BL2_IMAGE_ID);
-	assert(image_desc);
+	assert(image_desc != NULL);
 
 	/* Get the entry point info */
 	ep_info = &image_desc->ep_info;