add build kerneldeb -- modify dts

hc

2023-10-25 6c2073b7aa40e29d0eca7d571dd7bc590c7ecaa7

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config BR2_PACKAGE_MPFR
    bool "mpfr"
    select BR2_PACKAGE_GMP
    help
      C library for multiple-precision floating-point computations
      with exact rounding.
 
      http://www.mpfr.org/