arm64: dts: mediatek: mt7988a-bpi-r4: fix trace for spi-nand

WARNING: CPU: 0 PID: 1 at drivers/of/base.c:106 of_bus_n_addr_cells+0x88/0xe0

Author: frank-w

arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4.dts

@@ -348,6 +348,8 @@
 	spi_nand: spi_nand@0 {
 		compatible = "spi-nand";
 		reg = <0>;
+		#address-cells = <1>;
+		#size-cells = <0>;
 		spi-max-frequency = <52000000>;
 		spi-tx-buswidth = <4>;
 		spi-rx-buswidth = <4>;