mei: fix function names and format in KDoc

Align functions names in KDoc with real ones.
Fix comment format to be KDoc and fix wrong syntax there.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>