dts: arm: st: f4: add pllsai entry for the stm32f4 series.

Not all STM32F4 embeds a PLLSAI hence this is added in
stm32f427.dtsi and stm32f446.dtsi.

Signed-off-by: Alain Volmat <[email protected]>

Author: Alain Volmat

dts/arm/st/f4/stm32f427.dtsi

@@ -9,6 +9,14 @@
 #include <zephyr/dt-bindings/memory-controller/stm32-fmc-sdram.h>
 
 / {
+	clocks {
+		pllsai: pllsai {
+			compatible = "st,stm32fx-pllsai-clock";
+			#clock-cells = <0>;
+			status = "disabled";
+		};
+	};
+
 	soc {
 		compatible = "st,stm32f427", "st,stm32f4", "simple-bus";
 

dts/arm/st/f4/stm32f446.dtsi

@@ -13,6 +13,12 @@
 		plli2s: plli2s {
 			compatible = "st,stm32f411-plli2s-clock";
 		};
+
+		pllsai: pllsai {
+			compatible = "st,stm32fx-pllsai-clock";
+			#clock-cells = <0>;
+			status = "disabled";
+		};
 	};
 
 	soc {