ARM: davinci: board-dm646x-evm: pass correct I2C adapter id for VPIF

commit a16cb91a ("[media] media: vpif: use a configurable
i2c_adapter_id for vpif display") removed hardcoded I2C adaptor
setting in VPIF driver, but missed updating platform data passed
from DM646x board.

Fix it.

Fixes: a16cb91a ("[media] media: vpif: use a configurable i2c_adapter_id for vpif display")
Signed-off-by: Sekhar Nori <nsekhar@ti.com>