Completed STM32F411 support.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7352 35acf78f-673a-0410-8e92-d51de3d6d3f4
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7353 35acf78f-673a-0410-8e92-d51de3d6d3f4
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7354 35acf78f-673a-0410-8e92-d51de3d6d3f4
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7355 35acf78f-673a-0410-8e92-d51de3d6d3f4
Fixed bug #538.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7358 35acf78f-673a-0410-8e92-d51de3d6d3f4
Fixed bug #539.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7359 35acf78f-673a-0410-8e92-d51de3d6d3f4
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git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7362 35acf78f-673a-0410-8e92-d51de3d6d3f4
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7363 35acf78f-673a-0410-8e92-d51de3d6d3f4