ARM: rmobile: Add Beacon EmbeddedWorks RZG2N Dev Kit

The Beacon EmbeddedWorks kit is based on the R8A774B1 SoC also
known as the RZ/G2N.

The kit consists of a SOM + Baseboard and supports microSD,
eMMC, Ethernet, a couple celular radios, two CAN interfaces,
Bluetooth and WiFi.  It shares much of the same design as
the RZ/G2M dev kit.

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 858b79a..71f49cc 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -809,6 +809,7 @@
 
 dtb-$(CONFIG_RCAR_GEN3) += \
 	r8a774a1-beacon-rzg2m-kit.dtb \
+	r8a774b1-beacon-rzg2n-kit.dtb \
 	r8a77950-ulcb-u-boot.dtb \
 	r8a77950-salvator-x-u-boot.dtb \
 	r8a77960-ulcb-u-boot.dtb \