ARM: dts: stm32: Use clock DT binding definition on stm32f429 family

This patch uses clock DT binding definition instead numerical values
for stm32f429 board.
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: Alexandre TORGUE <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32429i-eval.dts

@@ -121,7 +121,7 @@ button@1 {
 	usbotg_hs_phy: usbphy {
 		#phy-cells = <0>;
 		compatible = "usb-nop-xceiv";
-		clocks = <&rcc 0 30>;
+		clocks = <&rcc 0 STM32F4_AHB1_CLOCK(OTGHSULPI)>;
 		clock-names = "main_clk";
 	};
 };