[KINETIS] Fix doxygen path

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7115 35acf78f-673a-0410-8e92-d51de3d6d3f4
[KINETIS] Fix thread function declarations

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7116 35acf78f-673a-0410-8e92-d51de3d6d3f4