aarch64-rpi4: removed MAC address assignment in u-boot.env file

features.in/aarch64-rpi4/image-scripts.d/97-gen-uboot-env

@@ -27,7 +27,6 @@ cpu=armv8
 dhcpuboot=usb start; dhcp u-boot.uimg; bootm
 distro_bootcmd=for target in ${boot_targets}; do run bootcmd_${target}; done
 efi_dtb_prefixes=/ /dtb/ /dtb/current/
-ethaddr=dc:a6:32:1a:86:f4
 fdt_addr=6000000
 fdt_addr_r=0x06000000
 fdt_high=ffffffffffffffff
@@ -51,7 +50,6 @@ soc=bcm283x
 stderr=serial,vidconsole
 stdin=serial,usbkbd
 stdout=serial,vidconsole
-usbethaddr=dc:a6:32:1a:86:f4
 vendor=raspberrypi
 
 EOF