ASoc: msm: qdsp6v2: Fix for NULL check

- Required check added for NULL pointer

Change-Id: I204dddb37048ba410381e46c0e906d0390951dd9
CRs-fixed: 583939
Signed-off-by: Mohammad Johny Shaik <mjshai@codeaurora.org>
Merge branch 'cm-11.0' into kk_mkt