qcacmn: Move wma_get_buf_start_scan_cmd to ucfg_scan_update_params

Move wma_get_buf_start_scan_cmd logic to common code in
ucfg_scan_update_params.

Change-Id: I4c9dcb48b4862ad10f64e260d87938251e270185
CRs-Fixed: 2180960
6 files changed