board: phytec: phycore_am62x: Use k3_mmc.env logic

Use our common environment file to implement MMC boot.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Reviewed-by: Wadim Egorov <w.egorov@phytec.de>
1 file changed