ASoC : msm: qdsp6v2: Add size check in audio cal ioctl

For the audio get calibration ioctl compare the allocated
buffer size to the size of the header and cal type header
to ensure the buffer is big enough.

CRs-Fixed: 1038127
Change-Id: I851b4454e8420706ad3263d67e892720d46e5718
Signed-off-by: Ben Romberger <bromberg@codeaurora.org>