rockchip: Add basic support for evb-rv1108 board

Add basic support for rv1108 evb, whith this patch we
can boot into u-boot console.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index cbfe17d..4d8a56a 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -46,7 +46,8 @@
 	rk3368-px5-evb.dtb \
 	rk3399-evb.dtb \
 	rk3399-firefly.dtb \
-	rk3399-puma.dtb
+	rk3399-puma.dtb \
+	rv1108-evb.dtb
 dtb-$(CONFIG_ARCH_MESON) += \
 	meson-gxbb-odroidc2.dtb
 dtb-$(CONFIG_TEGRA) += tegra20-harmony.dtb \