rockchip: rk3588-coolpi: Fix .dtb-file entries in Makefile

Fix CoolPi 4 Model B and CoolPi CM5 EVB .dtb-file entries in Makefile.

Fixes: 3e15dee38d45 ("board: rockchip: Add support for rk3588 based Cool Pi CM5 EVB")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Dragan Simic <dsimic@manjaro.org>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index dad8697..0c1295c 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -167,8 +167,8 @@
 	rk3568-rock-3a.dtb
 
 dtb-$(CONFIG_ROCKCHIP_RK3588) += \
-	rk3588s-coolpi-4b.dts \
-	rk3588-coolpi-cm5-evb.dts \
+	rk3588s-coolpi-4b.dtb \
+	rk3588-coolpi-cm5-evb.dtb \
 	rk3588-edgeble-neu6a-io.dtb \
 	rk3588-edgeble-neu6b-io.dtb \
 	rk3588-evb1-v10.dtb \