dmaengine: idxd: Add missing idxd cleanup to fix memory leak in remove call

The remove call stack is missing idxd cleanup to free bitmap, ida and
the idxd_device. Call idxd_free() helper routines to make sure we exit
gracefully.

Fixes: bfe1d56091c1 ("dmaengine: idxd: Init and probe for Intel data accelerators")
Cc: [e-mail]
Suggested-by: Vinicius Costa Gomes <[e-mail]>
Signed-off-by: Shuai Xue <[e-mail]>
Reviewed-by: Fenghua Yu <[e-mail]>
Reviewed-by: Dave Jiang <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/dma/idxd/init.c

···
 	destroy_workqueue(idxd->wq);
 	perfmon_pmu_remove(idxd);
 	put_device(idxd_confdev(idxd));
+	idxd_free(idxd);
 }
 
 static struct pci_driver idxd_pci_driver = {