systems: added lctr-a72xx to test cortex-a72 architecture.

architectures/cortex-a72.cfg

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+cfg_target_canonical="armv11-$cfg_glued_vendor-linux-gnueabi"
+cfg_target_linux='arm'
+cfg_target_uboot_arch='arm'
+cfg_target_gcc_flags='-O2 -pipe -funit-at-a-time -mcpu=cortex-a72 -mtune=cortex-a72 -mfloat-abi=hard -mfpu=neon-fp-armv8'
+cfg_target_gcc_configure_flags='--with-cpu=cortex-a72 --with-tune=cortex-a72 --with-fpu=neon-fp-armv8 --with-float=hard'
+cfg_target_ar_flags='aarch64-elf'

systems/lctr-a72xx/cfg/firmware/config.txt

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+# For more options and information see 
+# http://www.raspberrypi.org/documentation/configuration/config-txt.md
+# Some settings may impact device functionality. See link above for details
+
+kernel=uboot.bin
+device_tree_address=0x02000000
+
+# enable i2c
+dtparam=i2c_arm=on
+dtparam=spi=on
+
+# uncomment if you get no picture on HDMI for a default "safe" mode
+#hdmi_safe=1
+
+# uncomment this if your display has a black border of unused pixels visible
+# and your display can output without overscan
+#disable_overscan=1
+
+# uncomment the following to adjust overscan. Use positive numbers if console
+# goes off screen, and negative if there is too much border
+#overscan_left=16
+#overscan_right=16
+#overscan_top=16
+#overscan_bottom=16
+
+# uncomment to force a console size. By default it will be display's size minus
+# overscan.
+#framebuffer_width=1280
+#framebuffer_height=720
+
+# uncomment if hdmi display is not detected and composite is being output
+#hdmi_force_hotplug=1
+
+# uncomment to force a specific HDMI mode (this will force VGA)
+#hdmi_group=1
+#hdmi_mode=1
+
+# uncomment to force a HDMI mode rather than DVI. This can make audio work in
+# DMT (computer monitor) modes
+#hdmi_drive=2
+
+# uncomment to increase signal to HDMI, if you have interference, blanking, or
+# no display
+#config_hdmi_boost=4
+
+# uncomment for composite PAL
+#sdtv_mode=2
+
+#uncomment to overclock the arm. 700 MHz is the default.
+#arm_freq=800
+

systems/lctr-a72xx/config

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+cfg_architecture='cortex-a72'
+cfg_storage='data0:ext4:/opt'
+cfg_services0='dropbear network storage upgrade syslog ptpd'
+cfg_services1=''
+cfg_services2='dune'
+cfg_modules=''
+cfg_packages='dropbear rsync busybox e2fsprogs dosfstools ptpd rpcbind rpi-boot-firmware bison binutils openssl linux/rpi exiftool libusb'
+cfg_target_linux_kernel='arch/arm/boot/zImage'
+cfg_ptpd_interface='eth0'
+cfg_eth_ext_mk='255.255.0.0'
+cfg_eth_ext_gw='10.0.0.1'
+cfg_terminal='tty1'
+cfg_partitions=\
+(
+    rpi-boot BOOT0  512B    32MiB
+    root     root0  32MiB   544MiB
+    data     data0  544MiB  -1
+)
+

systems/lctr-a72xx/lctr-a72xx-testbed.cfg

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+cfg_hostname="lctr-a72xx-testbed"
+cfg_eth_ext_ip="10.0.200.18"
+cfg_kernel_boot_dev='/dev/mmcblk0p1'