OMAP4: hwmod: add I2C hwmods for OMAP4430

Add hwmod structures for I2C controllers on OMAP4430.

Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>