dsp: q6voice: Add buf size check for cvs cal data

Check for the max size of cvs command register
calibration data that can be copied else will
result in buffer overflow.

Change-Id: Ib1f0bf1f5548f5213514123bc56a42d32287100d
Signed-off-by: Sandhya Mutha Naga Venkata <quic_smuthana@quicinc.com>
(cherry picked from commit a6408aac7879641124823b3742f05167310d84ad)