arm: dts: stm32: add ltdc for STM32F746

Add display controller node in device-tree.

Signed-off-by: yannick fertre <yannick.fertre@st.com>
[agust: rebased on master]
Signed-off-by: Anatolij Gustschin <agust@denx.de>

arch/arm/dts/stm32f746.dtsi

@@ -330,6 +330,15 @@
 			interrupts = <50>;
 			clocks = <&rcc 0 STM32F7_APB1_CLOCK(TIM5)>;
 		};
+
+		ltdc: display-controller@40016800 {
+			compatible = "st,stm32-ltdc";
+			reg = <0x40016800 0x200>;
+			resets = <&rcc STM32F7_APB2_RESET(LTDC)>;
+			clocks = <&rcc 0 STM32F7_APB2_CLOCK(LTDC)>;
+			u-boot,dm-pre-reloc;
+			status = "disabled";
+		};
 	};
 };