add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# linux custom kernel at least 4.4.x
BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_4=y
 
BR2_LINUX_KERNEL_CUSTOM_LOCAL=y
BR2_LINUX_KERNEL_CUSTOM_LOCAL_LOCATION="$(TOPDIR)/../kernel"