dts: enable rockchip bpi-r2-pro due to pipeline fail

Author: frank-w

arch/arm64/boot/dts/Makefile

@@ -28,7 +28,7 @@ subdir-y += mediatek
 #subdir-y += qcom
 #subdir-y += realtek
 #subdir-y += renesas
-#subdir-y += rockchip
+subdir-y += rockchip
 #subdir-y += socionext
 #subdir-y += sophgo
 #subdir-y += sprd