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/Kconfig b/arch/arm/mach-kirkwood/Kconfig
index bbea3f6..199764f 100644
--- a/arch/arm/mach-kirkwood/Kconfig
+++ b/arch/arm/mach-kirkwood/Kconfig
@@ -72,6 +72,14 @@
 	  Kirkwood-based D-Link NASes such as DNS-320 & DNS-325,
 	  using Flattened Device Tree.
 
+config MACH_IB62X0_DT
+	bool "RaidSonic IB-NAS6210, IB-NAS6220 (Flattened Device Tree)"
+	select ARCH_KIRKWOOD_DT
+	help
+	  Say 'Y' here if you want your kernel to support the
+	  RaidSonic IB-NAS6210 & IB-NAS6220 devices, using
+	  Flattened Device Tree.
+
 config MACH_TS219
 	bool "QNAP TS-110, TS-119, TS-119P+, TS-210, TS-219, TS-219P and TS-219P+ Turbo NAS"
 	help