misc: qcom: qdsp6v2: initialize config_32

Not all memebers of config_32 are set before they are used which
might lead to invalid values being passed and used. To fix this issue
initialize all member variables of struct config_32 to 0 before
assigning specific values individually.

CRs-Fixed: 1058826
Change-Id: Ifea3a6e8bf45481c65a4455ee64318304798fee2
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>