OMAP4470: OPP: Change IVA OPP100 to CORE OPP dependency

From timing closure point only VDD_CORE should be scaled to OPP100
level for IVA to be able to work at OPP100. L3 frequency can stay
at 116MHz.
So CORE OPP100H can be used as dependent OPP for IVA OPP100.

Change-Id: I2493a4c45d81ebfbfd24600a90bd4ea2d3782c24
Signed-off-by: Oleksandr_Tyshchenko <oleksandr.tyshchenko@ti.com>