ARM: ti81xx: Move I2C entries in omap_hwmod_81xx to maintain grouping

There is no functional change here; the I2C and ELM entries leaked
into each other and this separates them again.

Signed-off-by: Graeme Smecher <gsmecher@threespeedlogic.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>