enable system led

hc

2024-08-09 3d911568f3069a842249d4de3843d281d5af84d6

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bootpart=0:1
bootdir=/
bootargs=console=ttyS0,115200n8 root=/dev/mmcblk0p2 ro rootwait
devtype=mmc
fdtfile=am5729-beagleboneai.dtb
uenvcmd=run loadimage; run loadfdt; printenv bootargs; bootz ${loadaddr} - ${fdtaddr}