arm64: dts: apple: t8112: Add dptx-phy node

On M2 desktop devices more parts of the HDMI output pipeline are under
the OS' control. One of this parts is the primary DPTX phy which drives
the the HDMI port through an integrated MCDP29XX DP to HDMI converter.

Signed-off-by: Janne Grunau <j@jannau.net>

Author: jannau

arch/arm64/boot/dts/apple/t8112.dtsi

@@ -1015,6 +1015,17 @@
 			};
 		};
 
+		dptxphy: phy@23c500000 {
+			compatible = "apple,t8112-dptx-phy", "apple,dptx-phy";
+			reg = <0x2 0x3c500000 0x0 0x4000>,
+				<0x2 0x3c540000 0x0 0xc000>;
+			reg-names = "core", "dptx";
+			power-domains = <&ps_dptx_ext_phy>;
+			#phy-cells = <0>;
+			#reset-cells = <0>;
+			status = "disabled"; /* only used on j473 */
+               };
+
 		nub_spmi: spmi@23d0d9300 {
 			compatible = "apple,t8112-spmi", "apple,spmi";
 			reg = <0x2 0x3d714000 0x0 0x100>;