After switching the MMIO registers to use pci_iomap, remember to dispose
of the mapping with pci_iounmap (for symmetry).
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
 out_iomapfree:
        io_mapping_free(dev_priv->mm.gtt_mapping);
 out_rmmap:
-       iounmap(dev_priv->regs);
+       pci_iounmap(dev->pdev, dev_priv->regs);
 put_bridge:
        pci_dev_put(dev_priv->bridge_dev);
 free_priv:
        }
 
        if (dev_priv->regs != NULL)
-               iounmap(dev_priv->regs);
+               pci_iounmap(dev->pdev, dev_priv->regs);
 
        intel_teardown_gmbus(dev);
        intel_teardown_mchbar(dev);