arm64: dts: mediatek: mt7981b-openwrt-one: Remove useless cells from flash@0

In spi2's flash@0 there is only one `partitions` subnode: this
alone makes specifying address and size cells useless, but then
this subnode has no address and no size, which even makes the
currently declared address/size cells wrong.

Fixes: 869b3bb ("arm64: dts: mediatek: mt7981b-openwrt-one: Enable SPI NOR")
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Author: AngeloGioacchino Del Regno

arch/arm64/boot/dts/mediatek/mt7981b-openwrt-one.dts

@@ -213,8 +213,6 @@
 		compatible = "jedec,spi-nor";
 		reg = <0>;
 		spi-max-frequency = <40000000>;
-		#address-cells = <1>;
-		#size-cells = <1>;
 
 		partitions {
 			compatible = "fixed-partitions";