arm64: dts: rockchip: add support for NanoPi R76S (#394)

Introduce initial device tree support for the FriendlyELEC NanoPi R76S
board, based on the Rockchip RK3576 SoC.

Author: SuperKali

arch/arm64/boot/dts/rockchip/Makefile

@@ -330,6 +330,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-vehicle-evb-v10.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-vehicle-evb-v10-linux.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-vehicle-evb-v20.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-vehicle-evb-v20-linux.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576-nanopi-r76s.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576s-evb1-v10.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576s-evb1-v10-linux.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3576s-tablet-v10.dtb