ipq806x: dts: Add support for RGMII RX and TX clock delays

This change enables support to select phy4 in RGMII mode and
enables RGMII TX/RX clock internal delays.

Signed-off-by: Ram Chandra Jangir <[email protected]>

target/linux/ipq806x/files-4.14/arch/arm/boot/dts/qcom-ipq8064-ap161.dts

@@ -220,6 +220,9 @@
 
 			phy4: ethernet-phy@4 {
 				reg = <4>;
+				qca,phy-rgmii-en;
+				qca,txclk-delay-en;
+				qca,rxclk-delay-en;
 			};
 
 			phy3: ethernet-phy@3 {