dts: st: u3: enable sai node for stm32u3xx

Define SAI nodes for STM32U3xx series

Signed-off-by: Mario Paja <[email protected]>

Author: mariopaja

dts/arm/st/u3/stm32u3.dtsi

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2025 STMicroelectronics
+ * Copyright (c) 2025 ZAL Zentrum für Angewandte Luftfahrtforschung GmbH
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -377,6 +378,28 @@
 			interrupts = <0 0>;
 			status = "disabled";
 		};
+
+		sai1_a: sai1@40015404 {
+			compatible = "st,stm32-sai";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x40015404 0x20>;
+			clocks = <&rcc STM32_CLOCK(APB2, 21)>;
+			dmas = <&gpdma1 1 36 (STM32_DMA_MODE_NORMAL | STM32_DMA_PRIORITY_HIGH |
+				STM32_DMA_16BITS)>;
+			status = "disabled";
+		};
+
+		sai1_b: sai1@40015424 {
+			compatible = "st,stm32-sai";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x40015424 0x20>;
+			clocks = <&rcc STM32_CLOCK(APB2, 21)>;
+			dmas = <&gpdma1 0 37 (STM32_DMA_MODE_NORMAL | STM32_DMA_PRIORITY_HIGH |
+				STM32_DMA_16BITS)>;
+			status = "disabled";
+		};
 	};
 };