OMAP4: Add IVA OPP enteries.

This Patch adds OPP enteries for IVA  in OMAP4 OPP Table

Tested on OMAP4430 SDP Board.

Signed-off-by: Shweta Gulati <shweta.gulati@ti.com>
Acked-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>