MLK-20208-2 mxc IPUv3: device: Avoid potential out of bounds array access

MLK-20208-2 mxc IPUv3: device: Avoid potential out of bounds array access

To avoid potential out of bounds array access on tbl->used[][],
let's check the tsk->ipu_id prior to that.  Based on the context,
this is what we can do to make the coverity happy.

Detected by CoverityScan, CID#17689 ("Derefernece before null check")

Signed-off-by: Liu Ying <victor.liu@nxp.com>
(cherry picked from commit f5dcf709c54da8e64eb84f1dd7a4452ad8d942cf)
Signed-off-by: Arulpandiyan Vadivel <arulpandiyan_vadivel@mentor.com>
Signed-off-by: Shrikant Bobade <Shrikant_Bobade@mentor.com>
(cherry picked from commit a9d03df1de0c6744335eb185506a3b6e27c4d24b)