powerpc/85xx: Add ethernet magic packet property to P1020 device tree

All eTSEC2 controllers support waking on magic packet so fixup device
tree to report that.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

arch/powerpc/boot/dts/p1020si.dtsi

@@ -200,6 +200,7 @@
 			compatible = "fsl,etsec2";
 			fsl,num_rx_queues = <0x8>;
 			fsl,num_tx_queues = <0x8>;
+			fsl,magic-packet;
 			local-mac-address = [ 00 00 00 00 00 00 ];
 			interrupt-parent = <&mpic>;
 
@@ -226,6 +227,7 @@
 			compatible = "fsl,etsec2";
 			fsl,num_rx_queues = <0x8>;
 			fsl,num_tx_queues = <0x8>;
+			fsl,magic-packet;
 			local-mac-address = [ 00 00 00 00 00 00 ];
 			interrupt-parent = <&mpic>;
 
@@ -252,6 +254,7 @@
 			compatible = "fsl,etsec2";
 			fsl,num_rx_queues = <0x8>;
 			fsl,num_tx_queues = <0x8>;
+			fsl,magic-packet;
 			local-mac-address = [ 00 00 00 00 00 00 ];
 			interrupt-parent = <&mpic>;