[KINETIS] Removed unused header

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7113 35acf78f-673a-0410-8e92-d51de3d6d3f4
[KINETIS] Add missing makefile for KL2x

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7114 35acf78f-673a-0410-8e92-d51de3d6d3f4