misc: qcom: qdsp6v2: Add missing initialization

Use variables in driver context after proper initialization

CRs-Fixed: 1049521, 1049615
Change-Id: I3e59e27534b8e1088d74b42c72e0075d2fe910e6
Signed-off-by: Haynes Mathew George <hgeorge@codeaurora.org>
Reviewed-on: http://mcrd1-22-pc.corpnet.asus/code-review/master/256468


Reviewed-by: jay_chuang <jay_chuang@asus.com>
Tested-by: jay_chuang <jay_chuang@asus.com>
Reviewed-by: Eric1 Lin <Eric1_Lin@asus.com>