boards: amlogic: Add FriendlyElec NanoPi K2 board support

This adds platform code for the FriendlyElec NanoPi K2 board based on a
Meson GXBB (S905) SoC with the Meson GXBB configuration.

This initial submission only supports:
- UART
- MMC/SDCard
- Ethernet
- Reset Controller
- Clock controller

Cc: Yuefei Tan <yftan@friendlyarm.com>
Signed-off-by: Thomas McKahan <tonymckahan@gmail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index f860588..016c54d 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -55,6 +55,7 @@
 dtb-$(CONFIG_ARCH_MESON) += \
 	meson-gxbb-nanopi-k2.dtb \
 	meson-gxbb-odroidc2.dtb \
+	meson-gxbb-nanopi-k2.dtb \
 	meson-gxl-s905x-p212.dtb \
 	meson-gxl-s905x-libretech-cc.dtb \
 	meson-gxl-s905x-khadas-vim.dtb