sdm: Fixes for destination scalar.

1. Validate input width and height while setting mixer resolution.
2. Fix to update destination scalar flags and enable corresponding logs.
3. Enable warning logs only during debugging to avoid flooding of logs.

Change-Id: I0d4e1537ed241c57551e58f4d52032bf2d3ea4b3
CRs-Fixed: 1038976
3 files changed