soc: qdsp6v2: fix compilation warning

Use right variable dereferencing to avoid the below compilation
warning.
 "error: aggregate value used where an integer was expected"

Change-Id: Iaa96c3d593b8e742c25fe5f275b8304fe9adec2d
Signed-off-by: Banajit Goswami <bgoswami@codeaurora.org>