[feature request] specify log-level during cpuinfo_initialize()

[cdluminate]

Quoted from https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=918177 :

libcpuinfo library selects log level during compile time.
1. It would be better if one could specify log-level during cpuinfo_initialize().
2. Anyway current compile-time setting is very annoing: on many processors it prints

Note (cpuinfo): Line power management: in /proc/cpuinfo is ignored: value contains only spaces