ARM: dts: add a devicetree for Raidsonic NAS IB-4220-B

This devicetree is simply based on the board file in
arch/arm/mach-gemini/board-nas4220b.c and contain the
equivalent platform data, mainly just moving the GPIOs
from the global numberspace to explicitly reference &gpio1.

Cc: Janos Laube <janos.dev@gmail.com>
Cc: Paulius Zaleckas <paulius.zaleckas@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Hans Ulli Kroll <ulli.kroll@googlemail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 6f965d3..96881ed 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -174,6 +174,7 @@
 	exynos5440-ssdk5440.dtb \
 	exynos5800-peach-pi.dtb
 dtb-$(CONFIG_ARCH_GEMINI) += \
+	gemini-nas4220b.dtb \
 	gemini-sq201.dtb
 dtb-$(CONFIG_ARCH_HI3xxx) += \
 	hi3620-hi4511.dtb