arm64: dts: rockchip: enable av1d iommu for rk3588-nvr

The av1d node is register av1dec_bus not platform bus,
so it no need to set okay status.

Signed-off-by: Yandong Lin <yandong.lin@rock-chips.com>
Change-Id: Id5ab7c5bf8380221b663730596335e9bda1eb6b2

arch/arm64/boot/dts/rockchip/rk3588-nvr.dtsi

@@ -63,6 +63,10 @@
 	};
 };
 
+&av1d_mmu {
+	status = "okay";
+};
+
 &CPU_SLEEP {
 	status = "disabled";
 };