Update ULL() macro and instances of ull to comply with MISRA

MISRA C-2012 Rule 7.3 violation: lowercase l shall not be used as literal suffixes.

This patch resolves this for the ULL() macro by using ULL suffix instead
of the ull suffix.

Change-Id: Ia8183c399e74677e676956e8653e82375d0e0a01
Signed-off-by: David Cunado <david.cunado@arm.com>
diff --git a/lib/xlat_tables/xlat_tables_common.c b/lib/xlat_tables/xlat_tables_common.c
index c6fa10e..1309936 100644
--- a/lib/xlat_tables/xlat_tables_common.c
+++ b/lib/xlat_tables/xlat_tables_common.c
@@ -31,7 +31,7 @@
 #define debug_print(...) ((void)0)
 #endif
 
-#define UNSET_DESC	~0ull
+#define UNSET_DESC	~0ULL
 
 static uint64_t xlat_tables[MAX_XLAT_TABLES][XLAT_TABLE_ENTRIES]
 			__aligned(XLAT_TABLE_SIZE) __section("xlat_table");