ARM: dts: Fix TI CPSW Phy mode selection on IGEP COM AQUILA.

As this board use external clock for RMII interface we should specify 'rmii'
phy mode and 'rmii-clock-ext' to make ethernet working.
Signed-off-by: NEnric Balletbo i Serra <eballetbo@iseebcn.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am335x-igep0033.dtsi

@@ -105,10 +105,16 @@
 
 &cpsw_emac0 {
 	phy_id = <&davinci_mdio>, <0>;
+	phy-mode = "rmii";
 };
 
 &cpsw_emac1 {
 	phy_id = <&davinci_mdio>, <1>;
+	phy-mode = "rmii";
+};
+
+&phy_sel {
+	rmii-clock-ext;
 };
 
 &elm {