rcar-gen3_setup: Fix wrong u-boot environment command
Task: https://phabricator.apertis.org/T8782
The right command to reset the default environment is env, not
setenv. Fix this.
🟡 v2023.5 entered Soft Feature Freeze, no additional features will be accepted • schedule
Task: https://phabricator.apertis.org/T8782
The right command to reset the default environment is env, not
setenv. Fix this.