asoc: csra66x0: Disable volume ramping in codec

CSRA66x0 codec enables internal volume ramping on
power up. This leads to missing audio at beginning
of playback. Disable feature on codec init.

Change-Id: Ib3085cd06eeb2797bee4e74d8e34e5d0b0fa535f
Signed-off-by: Dieter Luecking <dieterl@codeaurora.org>