Mingw64 headers. Include ntdef.h and ntdll.h rather than ddk headers.
Define _WIN32_WINNT and WINVER as 0x0602.
(RtlEqualUnicodePathPrefix): Drop definition. Pulled in from ntdll.h
now.
(get_device_name): s/Zw/Nt.
* dumper.cc: Include sys/param.h
(dumper::dump_memory_region): Use MIN rather than min.
* locale.cc: Include stdlib.h. Define _WIN32_WINNT and WINVER as
0x0602.
* ps.cc: Include ntdef.h and ntdll.h rather than ddk headers.
* regtool.cc (regDeleteKeyEx): Drop WINADVAPI qualifier.