[IA64] fix mfn_to_local_pfn() for dma context

Thanks to Kevin for tracking down this problem.  This is a temporary
solution until we come up with something better for ia64.

Signed-off-by: Alex Williamson <alex.williamson@hp.com>

linux-2.6-xen-sparse/include/asm-ia64/page.h

@@ -331,7 +331,7 @@ static inline unsigned long
 mfn_to_local_pfn(unsigned long mfn)
 {
 	extern unsigned long max_mapnr;
-	unsigned long pfn = mfn_to_pfn(mfn);
+	unsigned long pfn = mfn_to_pfn_for_dma(mfn);
 	if (!pfn_valid(pfn))
 		return INVALID_P2M_ENTRY;
 	return pfn;