powerpc/fsl/dts: add sg_2500_aqr105_phy4 alias on t1024rdb

The alias is used by the boot loader to perform a device tree
fixup.
Signed-off-by: NMadalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: NScott Wood <oss@buserror.net>

arch/powerpc/boot/dts/fsl/t1024rdb.dts

@@ -41,6 +41,10 @@
 	#size-cells = <2>;
 	interrupt-parent = <&mpic>;
 
+	aliases {
+		sg_2500_aqr105_phy4 = &sg_2500_aqr105_phy4;
+	};
+
 	reserved-memory {
 		#address-cells = <2>;
 		#size-cells = <2>;