add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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config BR2_PACKAGE_LIBPCAP
    bool "libpcap"
    select BR2_PACKAGE_ZLIB
    help
      A system-independent library for user-level network packet
      capture.
 
      http://www.tcpdump.org/