mailbox: mtk-cmdq: Remove needless devm_kfree() calls

Memory allocated through device-managed functions doesn't need to be
explicitly freed, so these calls can be removed.

Signed-off-by: Thierry Reding <[e-mail]>
Signed-off-by: Jassi Brar <[e-mail]>

drivers/mailbox/mtk-cmdq-mailbox.c

···
 
 	clk_unprepare(cmdq->clock);
 
-	if (cmdq->mbox.chans)
-		devm_kfree(&pdev->dev, cmdq->mbox.chans);
-
-	if (cmdq->thread)
-		devm_kfree(&pdev->dev, cmdq->thread);
-
-	devm_kfree(&pdev->dev, cmdq);
-
 	return 0;
 }