board: phycore-imx93: env: Move bootcmd from defconfig to env

Move the default bootcmd from the defconfig to the board environment in
preparation for RAUC support. No change in functionality.

Signed-off-by: Leonard Anderweit <l.anderweit@phytec.de>
Signed-off-by: Primoz Fiser <primoz.fiser@norik.com>
2 files changed