parisc: properly type the return value of parisc_walk_tree

Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NHelge Deller <deller@gmx.de>

drivers/parisc/iommu.h

@@ -6,7 +6,7 @@
 struct parisc_device;
 struct ioc;
 
-static inline void *parisc_walk_tree(struct device *dev)
+static inline struct pci_hba_data *parisc_walk_tree(struct device *dev)
 {
 	struct device *otherdev;