arm64: dts: mediatek: mt8183: add keyboard node

MT8183 has an on-SoC keyboard controller commonly used for volume
up/down buttons.

List it in the SoC dts so that boards can enable/use it.
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220720-mt8183-keypad-v2-6-6d42c357cb76@baylibre.comSigned-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt8183.dtsi

@@ -943,6 +943,15 @@ pwrap: pwrap@1000d000 {
 			clock-names = "spi", "wrap";
 		};
 
+		keyboard: keyboard@10010000 {
+			compatible = "mediatek,mt6779-keypad";
+			reg = <0 0x10010000 0 0x1000>;
+			interrupts = <GIC_SPI 186 IRQ_TYPE_EDGE_FALLING>;
+			clocks = <&clk26m>;
+			clock-names = "kpd";
+			status = "disabled";
+		};
+
 		scp: scp@10500000 {
 			compatible = "mediatek,mt8183-scp";
 			reg = <0 0x10500000 0 0x80000>,