dt-bindings: arm: Add bindings for Mediatek MT8183 SoC Platform

This adds dt-binding documentation of cpu for Mediatek MT8183.
Signed-off-by: Erin Lo <erin.lo@mediatek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

Documentation/devicetree/bindings/arm/mediatek.txt

@@ -20,6 +20,7 @@ compatible: Must contain one of
    "mediatek,mt8127"
    "mediatek,mt8135"
    "mediatek,mt8173"
+   "mediatek,mt8183"
 
 
 Supported boards:
@@ -77,3 +78,6 @@ Supported boards:
 - MTK mt8173 tablet EVB:
     Required root node properties:
       - compatible = "mediatek,mt8173-evb", "mediatek,mt8173";
+- Evaluation board for MT8183:
+    Required root node properties:
+      - compatible = "mediatek,mt8183-evb", "mediatek,mt8183";