[dvfs] Declared module_t and dvfs_option_t types
[dvfs] Declared module_t and dvfs_option_t types

nkawahara/Graphite,8l/Graphite,nkawahara/Graphite,victorisildur/Graphite,8l/Graphite,fhijaz/Graphite,mit-carbon/Graphite,fhijaz/Graphite,8l/Graphite,mit-carbon/Graphite,fhijaz/Graphite,mit-carbon/Graphite,victorisildur/Graphite,victorisildur/Graphite,victorisildur/Graphite,mit-carbon/Graphite,8l/Graphite,fhijaz/Graphite,nkawahara/Graphite,nkawahara/Graphite