I2C ported but needs to be reviewed to not use virtual timers directly.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/kernel_3_dev@6170 35acf78f-673a-0410-8e92-d51de3d6d3f4


git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/kernel_3_dev@6171 35acf78f-673a-0410-8e92-d51de3d6d3f4