powerpc/pci: Override pcibios_release_device()

The patch overrides pcibios_release_device() to release EEH
resources (EEH cache, unbinding EEH device) for the indicated PCI
device.
Signed-off-by: NGavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/kernel/pci-hotplug.c

@@ -21,6 +21,17 @@
 #include <asm/firmware.h>
 #include <asm/eeh.h>
 
+/**
+ * pcibios_release_device - release PCI device
+ * @dev: PCI device
+ *
+ * The function is called before releasing the indicated PCI device.
+ */
+void pcibios_release_device(struct pci_dev *dev)
+{
+	eeh_remove_device(dev, 1);
+}
+
 /**
  * __pcibios_remove_pci_devices - remove all devices under this bus
  * @bus: the indicated PCI bus