ARM: dts: stm32mp: alignment with v6.6-rc1

Device tree alignment with Linux kernel v6.6.rc1.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/arch/arm/dts/stm32mp157.dtsi b/arch/arm/dts/stm32mp157.dtsi
index 54e73cc..6197d87 100644
--- a/arch/arm/dts/stm32mp157.dtsi
+++ b/arch/arm/dts/stm32mp157.dtsi
@@ -22,15 +22,26 @@
 			reg = <0x5a000000 0x800>;
 			clocks = <&rcc DSI_K>, <&clk_hse>, <&rcc DSI_PX>;
 			clock-names = "pclk", "ref", "px_clk";
+			phy-dsi-supply = <&reg18>;
 			resets = <&rcc DSI_R>;
 			reset-names = "apb";
-			#address-cells = <1>;
-			#size-cells = <0>;
 			status = "disabled";
 
 			ports {
 				#address-cells = <1>;
 				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+					dsi_in: endpoint {
+					};
+				};
+
+				port@1 {
+					reg = <1>;
+					dsi_out: endpoint {
+					};
+				};
 			};
 		};
 	};