ARM: dts: stm32: Add STMMAC clocks for stm32f746

Add ETHMAC, ETHMACRX and ETHMACTX clocks for STMMAC.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Vikas Manocha <vikas.manocha@st.com>
diff --git a/arch/arm/dts/stm32f746.dtsi b/arch/arm/dts/stm32f746.dtsi
index 929bf82..46d148e 100644
--- a/arch/arm/dts/stm32f746.dtsi
+++ b/arch/arm/dts/stm32f746.dtsi
@@ -65,6 +65,9 @@
 			compatible = "st,stm32-dwmac";
 			reg = <0x40028000 0x8000>;
 			reg-names = "stmmaceth";
+			clocks = <&rcc 0 STM32F7_AHB1_CLOCK(ETHMAC)>,
+				 <&rcc 0 STM32F7_AHB1_CLOCK(ETHMACTX)>,
+				 <&rcc 0 STM32F7_AHB1_CLOCK(ETHMACRX)>;
 			interrupts = <61>, <62>;
 			interrupt-names = "macirq", "eth_wake_irq";
 			snps,pbl = <8>;