arm64: dts: mt8173: fix property typo of 'phys' in dsi node

Use 'phys' instead of 'phy'.

Fixes: 81ad4dba ("arm64: dts: mt8173: Add display subsystem related nodes")
Signed-off-by: NChunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-by: NChun-Kuang Hu <chunkuang.hu@kernel.org>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210316092232.9806-5-chunfeng.yun@mediatek.comSigned-off-by: NMatthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt8173.dtsi

@@ -1235,7 +1235,7 @@
 				 <&mmsys CLK_MM_DSI1_DIGITAL>,
 				 <&mipi_tx1>;
 			clock-names = "engine", "digital", "hs";
-			phy = <&mipi_tx1>;
+			phys = <&mipi_tx1>;
 			phy-names = "dphy";
 			status = "disabled";
 		};