ASoC: msm-compr: Fix possible array out of bounds

Add check to avoid possible array out of bounds in function
msm_compr_send_ddp_cfg.

CRs-fixed: 925138
Change-Id: If3915565bdea998404854bd73ff7dafb8a2b23b0
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>
Signed-off-by: Meng Wang <mwang@codeaurora.org>