ASoC: msm: qdsp6v2: add integer overflow check

The overflow check is required to ensure that user space data
in kernel may not cause integer overflow which would later
lead to a buffer overflow.

CRs-Fixed: 563086
Change-Id: Ia0c785b8c895c317e9f904bc738df5217b837191
Signed-off-by: Aravind Kumar <akumark@codeaurora.org>