add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

1
2
# Locally computed:
sha256  938f597394b33e82e5af8c98bd5ea1a238f61892aabef36384adbf7ca5b52dda  u-boot-2018.01.tar.bz2