ARM: kirkwood: Add support for RaidSonic IB-NAS6210/6220 using devicetree

Add support for the IB-NAS6210 and IB-NAS 6220. Describe as much as
currently possible in the devicetree files, including the NAND partitions.
Use the partition scheme of the original firmware by default.

Create a board-ib62x0.c for everything else.

Signed-off-by: Simon Baatz <gmbnomis@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
diff --git a/arch/arm/mach-kirkwood/common.h b/arch/arm/mach-kirkwood/common.h
index 5f0365c..a34c41a 100644
--- a/arch/arm/mach-kirkwood/common.h
+++ b/arch/arm/mach-kirkwood/common.h
@@ -70,6 +70,12 @@
 static inline void iconnect_init(void) {};
 #endif
 
+#ifdef CONFIG_MACH_IB62X0_DT
+void ib62x0_init(void);
+#else
+static inline void ib62x0_init(void) {};
+#endif
+
 /* early init functions not converted to fdt yet */
 char *kirkwood_id(void);
 void kirkwood_l2_init(void);