xlat: Fix MISRA defects

Fix defects of MISRA C-2012 rules 8.13, 10.1, 10.3, 10.4, 10.8, 11.6,
14.4, 15.7, 17.8, 20.10, 20.12, 21.1 and Directive 4.9.

Change-Id: I7ff61e71733908596dbafe2e99d99b4fce9765bd
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/plat/rpi3/include/platform_def.h b/plat/rpi3/include/platform_def.h
index 4674bfb..1950376 100644
--- a/plat/rpi3/include/platform_def.h
+++ b/plat/rpi3/include/platform_def.h
@@ -217,8 +217,8 @@
  */
 #define ADDR_SPACE_SIZE			(ULL(1) << 32)
 
-#define MAX_MMAP_REGIONS		U(8)
-#define MAX_XLAT_TABLES			U(4)
+#define MAX_MMAP_REGIONS		8
+#define MAX_XLAT_TABLES			4
 
 #define MAX_IO_DEVICES			U(3)
 #define MAX_IO_HANDLES			U(4)