arm: clean cache management

unify arm cache management except for non standard cache as ARM7TDMI

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/configs/zylonite.h b/include/configs/zylonite.h
index 064740d..217636a 100644
--- a/include/configs/zylonite.h
+++ b/include/configs/zylonite.h
@@ -47,6 +47,9 @@
 #undef CONFIG_SKIP_RELOCATE_UBOOT
 #undef CONFIG_USE_IRQ			/* we don't need IRQ/FIQ stuff */
 
+/* we will never enable dcache, because we have to setup MMU first */
+#define CONFIG_SYS_NO_DCACHE
+
 /*
  * Size of malloc() pool
  */