[IA64] Fix pcibios_setup

pcibios_setup() should return NULL if it handled a parameter.  Since ia64
handles no parameters, it should return the string that was passed in,
not NULL.  This brings ia64 into line with all other architectures that
handle no parameters.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 0b30ca0..9ba32b2 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -579,7 +579,7 @@
 char * __init
 pcibios_setup (char *str)
 {
-	return NULL;
+	return str;
 }
 
 int