ARM: dts: socfpga: Drop phy-addr OF property from CV dtsi

The phy-addr property of stmmac is deprecated and the stmmac driver
does not use it either. On the contrary, the driver will warn if
this property is defined. Remove it.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>

arch/arm/boot/dts/socfpga_cyclone5.dtsi

@@ -40,7 +40,6 @@ mmc0: dwmmc0@ff704000 {
 
 		ethernet@ff702000 {
 			phy-mode = "rgmii";
-			phy-addr = <0xffffffff>; /* probe for phy addr */
 			status = "okay";
 		};