dt-bindings: ARM: Mediatek: Add audsys document binding for MT8192

This patch adds the audsys document binding for MT8192 SoC.
Signed-off-by: Chun-Jie Chen <chun-jie.chen@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210726105719.15793-4-chun-jie.chen@mediatek.comSigned-off-by: Stephen Boyd <sboyd@kernel.org>

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

@@ -13,6 +13,7 @@ Required Properties:
 	- "mediatek,mt7623-audsys", "mediatek,mt2701-audsys", "syscon"
 	- "mediatek,mt8167-audiosys", "syscon"
 	- "mediatek,mt8183-audiosys", "syscon"
+	- "mediatek,mt8192-audsys", "syscon"
 	- "mediatek,mt8516-audsys", "syscon"
 - #clock-cells: Must be 1