ARM: dts: stm32: Add dma config for spi5 on stm32f429

Enable spi5's dma configuration for graphics data output to
ilitek ili9341 panel via mipi dbi interface.
Signed-off-by: dillon min <dillon.minfei@gmail.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32f429.dtsi

@@ -660,6 +660,9 @@ spi5: spi@40015000 {
 			reg = <0x40015000 0x400>;
 			interrupts = <85>;
 			clocks = <&rcc 0 STM32F4_APB2_CLOCK(SPI5)>;
+			dmas = <&dma2 3 2 0x400 0x0>,
+				<&dma2 4 2 0x400 0x0>;
+			dma-names = "rx", "tx";
 			status = "disabled";
 		};