mfd: Fix DaVinci voice codec device name

Fix the device name in DaVinci Voice Codec MFD driver to load
davinci-vcif and cq93vc codec client drivers.

Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>