dt-bindings: clock: mediatek: add audsys support for MT2701

This patch adds a compatible string for MT2701.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/arm/mediatek/mediatek,audsys.txt

@@ -6,6 +6,7 @@ The MediaTek AUDSYS controller provides various clocks to the system.
 Required Properties:
 
 - compatible: Should be one of:
+	- "mediatek,mt2701-audsys", "syscon"
 	- "mediatek,mt7622-audsys", "syscon"
 - #clock-cells: Must be 1