ADD hym8563 RTC

hc

2023-02-15 557890c7ca0980ccc625a4e8f0cfa8898649a5c6

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config BR2_PACKAGE_PNGQUANT
    bool "pngquant"
    select BR2_PACKAGE_LIBPNG
    select BR2_PACKAGE_ZLIB
    help
      Lossy PNG compressor — pngquant command and libimagequant
      library
 
      https://pngquant.org