avr32: Use <mach/foo.h> instead of <asm/arch/foo.h>

Update all avr32-specific files to use the new platform-specific header
locations. Drivers shared with ARM are left alone for now.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
diff --git a/arch/avr32/include/asm/irq.h b/arch/avr32/include/asm/irq.h
index c563b77..6fa8913f 100644
--- a/arch/avr32/include/asm/irq.h
+++ b/arch/avr32/include/asm/irq.h
@@ -3,7 +3,7 @@
 
 #define NR_INTERNAL_IRQS	64
 
-#include <asm/arch/irq.h>
+#include <mach/irq.h>
 
 #ifndef NR_IRQS
 #define NR_IRQS			(NR_INTERNAL_IRQS)