rockchip: rk3588-toybrick: Add .dtb-file entry in Makefile

Add Rockchip Toybrick TB-RK3588X .dtb-file entry in Makefile.

Fixes: 9fdd9a546986 ("board: rockchip: add Rockchip Toybrick TB-RK3588X board")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 0c1295c..0c6f022 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -180,6 +180,7 @@
 	rk3588-quartzpro64.dtb \
 	rk3588s-rock-5a.dtb \
 	rk3588-rock-5b.dtb \
+	rk3588-toybrick-x0.dtb \
 	rk3588-turing-rk1.dtb
 
 dtb-$(CONFIG_ROCKCHIP_RV1108) += \