AVR32: Make cacheflush cpu-dependent

The AT32UC3A series of processors doesn't contain any cache, and issuing
cache control instructions on those will cause an exception. This commit
makes cacheflush.h arch-dependent in preparation for the AT32UC3A-support.

Signed-off-by: Gunnar Rangoy <gunnar@rangoy.com>
Signed-off-by: Paul Driveklepp <pauldriveklepp@gmail.com>
Signed-off-by: Olav Morken <olavmrk@gmail.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
diff --git a/board/atmel/atstk1000/flash.c b/board/atmel/atstk1000/flash.c
index 4d380f3..0ba06dd 100644
--- a/board/atmel/atstk1000/flash.c
+++ b/board/atmel/atstk1000/flash.c
@@ -22,7 +22,7 @@
 #include <common.h>
 
 #ifdef CONFIG_ATSTK1000_EXT_FLASH
-#include <asm/cacheflush.h>
+#include <asm/arch/cacheflush.h>
 #include <asm/io.h>
 #include <asm/sections.h>