[POWERPC] pasemi: Fix iommu + 64K PAGE_SIZE bug

The powerpc iommu code was refactored by Linas back in the 2.6.20 time
frame to map 4K pages from the generic code, but I had forgotten to go
back and fix my platform driver before submitting it.
Signed-off-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

arch/powerpc/platforms/pasemi/iommu.c

@@ -31,8 +31,6 @@
 #define IOBMAP_PAGE_SIZE	(1 << IOBMAP_PAGE_SHIFT)
 #define IOBMAP_PAGE_MASK	(IOBMAP_PAGE_SIZE - 1)
 
-#define IOBMAP_PAGE_FACTOR	(PAGE_SHIFT - IOBMAP_PAGE_SHIFT)
-
 #define IOB_BASE		0xe0000000
 #define IOB_SIZE		0x3000
 /* Configuration registers */
@@ -97,9 +95,6 @@ static void iobmap_build(struct iommu_table *tbl, long index,
 
 	bus_addr = (tbl->it_offset + index) << PAGE_SHIFT;
 
-	npages <<= IOBMAP_PAGE_FACTOR;
-	index <<= IOBMAP_PAGE_FACTOR;
-
 	ip = ((u32 *)tbl->it_base) + index;
 
 	while (npages--) {
@@ -125,9 +120,6 @@ static void iobmap_free(struct iommu_table *tbl, long index,
 
 	bus_addr = (tbl->it_offset + index) << PAGE_SHIFT;
 
-	npages <<= IOBMAP_PAGE_FACTOR;
-	index <<= IOBMAP_PAGE_FACTOR;
-
 	ip = ((u32 *)tbl->it_base) + index;
 
 	while (npages--) {