scsi: pm80xx: Use bitmap_zalloc() for tags bitmap allocation

We used to allocate X bytes while we only need X bits.

Link: https://lore.kernel.org/r/[e-mail]
Reviewed-by: Vishakha Channapattan <[e-mail]>
Acked-by: Jack Wang <[e-mail]>
Signed-off-by: Igor Pylypiv <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/pm8001/pm8001_init.c

···
 	}
 	PM8001_CHIP_DISP->chip_iounmap(pm8001_ha);
 	flush_workqueue(pm8001_wq);
-	kfree(pm8001_ha->tags);
+	bitmap_free(pm8001_ha->tags);
 	kfree(pm8001_ha);
 }
 
···
 	can_queue = ccb_count - PM8001_RESERVE_SLOT;
 	shost->can_queue = can_queue;
 
-	pm8001_ha->tags = kzalloc(ccb_count, GFP_KERNEL);
+	pm8001_ha->tags = bitmap_zalloc(ccb_count, GFP_KERNEL);
 	if (!pm8001_ha->tags)
 		goto err_out;