clang format files under port/

[siying]

Summary:
Run "clang-format" against files under port to make it happy.

Test Plan: Watch existing CI to pass.

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[anand1976]

Should we ignore the make check-format error? I guess the newer clangformat supersedes that?

[siying]

Should we ignore the make check-format error? I guess the newer clangformat supersedes that?

That's a good point. Let me fix the code to make "make format" happy.

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[siying]

The failure is odd:

In file included from /root/project/port/win/port_win.cc:12:
/root/project/port/win/port_win.h: In function 'void* rocksdb::port::cacheline_aligned_alloc(size_t)':
/root/project/port/win/port_win.h:227:10: error: '_aligned_malloc' was not declared in this scope; did you mean '_aligned_realloc'?
  227 |   return _aligned_malloc(size, CACHE_LINE_SIZE);
      |          ^~~~~~~~~~~~~~~
      |          _aligned_realloc
/root/project/port/win/port_win.h: In function 'void rocksdb::port::cacheline_aligned_free(void*)':
/root/project/port/win/port_win.h:235:3: error: '_aligned_free' was not declared in this scope; did you mean '_aligned_realloc'?
  235 |   _aligned_free(memblock);
      |   ^~~~~~~~~~~~~
      |   _aligned_realloc

Let me try to revert some header order.

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