Of course it is possible. Just add that line to a startup script so it will be run when you boot the device.
# nano /etc/systemd/system/cpug.service
[Unit] Description=Change CPU Govenor performance [Service] Type=forking ExecStart=/bin/sh -c "/bin/echo 'performance' > /sys/devices/platform/kgsl-3d0.0/kgsl/kgsl-3d0/pwrscale/trustzone/governor" # If you install my cpufrequtils # ExecStart=/usr/bin/cpufreq-set -g performance [Install] WantedBy=multi-user.target
# systemctl start cpug.service
# systemctl enable cpug.service