sparc: remove references to of_device and to_of_device

of_device is just a #define alias to platform_device.  This patch
replaces all references to it with platform_device.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/kernel/pci_impl.h b/arch/sparc/kernel/pci_impl.h
index 0318682..e20ed5f 100644
--- a/arch/sparc/kernel/pci_impl.h
+++ b/arch/sparc/kernel/pci_impl.h
@@ -91,7 +91,7 @@
 	char				*name;
 
 	/* OBP specific information. */
-	struct of_device		*op;
+	struct platform_device		*op;
 	u64				ino_bitmap;
 
 	/* PBM I/O and Memory space resources. */