Add hwmod data for IVA2 module on OMAP3.

Naming of "iva" instead of "iva2" to be aligned with OMAP4 naming done
by Benoit Cousson.

Cc: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>