mx27: add function enable_caches

Signed-off-by: Philippe Reynes <tremyfr@yahoo.fr>
diff --git a/arch/arm/cpu/arm926ejs/mx27/generic.c b/arch/arm/cpu/arm926ejs/mx27/generic.c
index 41bb84b..bffbadd 100644
--- a/arch/arm/cpu/arm926ejs/mx27/generic.c
+++ b/arch/arm/cpu/arm926ejs/mx27/generic.c
@@ -380,3 +380,11 @@
 
 }
 #endif /* CONFIG_MXC_MMC */
+
+#ifndef CONFIG_SYS_DCACHE_OFF
+void enable_caches(void)
+{
+	/* Enable D-cache. I-cache is already enabled in start.S */
+	dcache_enable();
+}
+#endif /* CONFIG_SYS_DCACHE_OFF */