I2C. Added startup functions for I2C1 and I2C3 interfaces.
I2C. Added startup functions for I2C1 and I2C3 interfaces.

git-svn-id: 42fb8b5ac3c3e37b202b6eb62b1b650836efe64b@3554 35acf78f-673a-0410-8e92-d51de3d6d3f4

roboknight/chibios-lpc43xx,roboknight/chibios-lpc43xx