[KINETIS] Removed stack sizes from linker scripts

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7237 35acf78f-673a-0410-8e92-d51de3d6d3f4
[KINETIS] Fix timer registers for K2x

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7238 35acf78f-673a-0410-8e92-d51de3d6d3f4