ARM: dts: stm32: add SPI support on STM32F746

Add device tree nodes for the STM32F746 SPI controllers.
Signed-off-by: Ben Wolsieffer <ben.wolsieffer@hefring.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

arch/arm/boot/dts/st/stm32f746.dtsi

@@ -274,6 +274,26 @@ gcan3: gcan@40003600 {
 			clocks = <&rcc 0 STM32F7_APB1_CLOCK(CAN3)>;
 		};
 
+		spi2: spi@40003800 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "st,stm32f7-spi";
+			reg = <0x40003800 0x400>;
+			interrupts = <36>;
+			clocks = <&rcc 0 STM32F7_APB1_CLOCK(SPI2)>;
+			status = "disabled";
+		};
+
+		spi3: spi@40003c00 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "st,stm32f7-spi";
+			reg = <0x40003c00 0x400>;
+			interrupts = <51>;
+			clocks = <&rcc 0 STM32F7_APB1_CLOCK(SPI3)>;
+			status = "disabled";
+		};
+
 		usart2: serial@40004400 {
 			compatible = "st,stm32f7-uart";
 			reg = <0x40004400 0x400>;
@@ -491,6 +511,26 @@ sdio1: mmc@40012c00 {
 			status = "disabled";
 		};
 
+		spi1: spi@40013000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "st,stm32f7-spi";
+			reg = <0x40013000 0x400>;
+			interrupts = <35>;
+			clocks = <&rcc 0 STM32F7_APB2_CLOCK(SPI1)>;
+			status = "disabled";
+		};
+
+		spi4: spi@40013400 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "st,stm32f7-spi";
+			reg = <0x40013400 0x400>;
+			interrupts = <84>;
+			clocks = <&rcc 0 STM32F7_APB2_CLOCK(SPI4)>;
+			status = "disabled";
+		};
+
 		syscfg: syscon@40013800 {
 			compatible = "st,stm32-syscfg", "syscon";
 			reg = <0x40013800 0x400>;
@@ -555,6 +595,26 @@ pwm {
 			};
 		};
 
+		spi5: spi@40015000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "st,stm32f7-spi";
+			reg = <0x40015000 0x400>;
+			interrupts = <85>;
+			clocks = <&rcc 0 STM32F7_APB2_CLOCK(SPI5)>;
+			status = "disabled";
+		};
+
+		spi6: spi@40015400 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "st,stm32f7-spi";
+			reg = <0x40015400 0x400>;
+			interrupts = <86>;
+			clocks = <&rcc 0 STM32F7_APB2_CLOCK(SPI6)>;
+			status = "disabled";
+		};
+
 		ltdc: display-controller@40016800 {
 			compatible = "st,stm32-ltdc";
 			reg = <0x40016800 0x200>;