powerpc/dart: remove dead cleanup code in iommu_init_early_dart

If dart_init failed we didn't have a chance to setup dma or controller
ops yet, so there is no point in resetting them.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/sysdev/dart_iommu.c

@@ -428,7 +428,7 @@ void __init iommu_init_early_dart(struct pci_controller_ops *controller_ops)
 
 	/* Initialize the DART HW */
 	if (dart_init(dn) != 0)
-		goto bail;
+		return;
 
 	/* Setup bypass if supported */
 	if (dart_is_u4)
@@ -439,15 +439,6 @@ void __init iommu_init_early_dart(struct pci_controller_ops *controller_ops)
 
 	/* Setup pci_dma ops */
 	set_pci_dma_ops(&dma_iommu_ops);
-	return;
-
- bail:
-	/* If init failed, use direct iommu and null setup functions */
-	controller_ops->dma_dev_setup = NULL;
-	controller_ops->dma_bus_setup = NULL;
-
-	/* Setup pci_dma ops */
-	set_pci_dma_ops(&dma_nommu_ops);
 }
 
 #ifdef CONFIG_PM