beaglev_fire: remove fdt set from boot script

With the latest U-Boot update, U-Boot now handles this step in the
board setup removing the need to set this from a custom boot script.
Remove redundant fdt set command from boot script.

Signed-off-by: Jamie Gibbons <jamie.gibbons@microchip.com>
Signed-off-by: Romain Naour <romain.naour@smile.fr>

Author: jamiegibbons

board/beagleboard/beaglev_fire/boot.cmd

@@ -11,6 +11,5 @@ bootm loados ${scriptaddr};
 # Try to load a ramdisk if available inside fitImage
 bootm ramdisk;
 bootm prep;
-fdt set /soc/ethernet@20110000 mac-address ${beaglevfire_mac_addr0};
 run design_overlays;
 bootm go;