[KINETIS] Improved PORT IRQC definition

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7213 35acf78f-673a-0410-8e92-d51de3d6d3f4
[KINETIS] Correct K2x NUM_VECTORS

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7214 35acf78f-673a-0410-8e92-d51de3d6d3f4