ASoC: msm: qdsp6v2: Fix bug in device V2 command

Add missing braces for Device V2 command failure case.
Crs-fixed: 492994

Change-Id: Ieacbbe94897a4fb73e6ffadc7d1bdcadb2b35dd2
Signed-off-by: Venkat Sudhir <vsudhir@codeaurora.org>