Fix region sizing problem in dma_mark_declared_memory_occupied()

The current code reserves too few pages if addr isn't
page aligned and size just spans onto the last page.
Fix by increasing size by the addr misalignment amount.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

arch/i386/kernel/pci-dma.c

@@ -131,7 +131,7 @@ void *dma_mark_declared_memory_occupied(struct device *dev,
 					dma_addr_t device_addr, size_t size)
 {
 	struct dma_coherent_mem *mem = dev->dma_mem;
-	int pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
+	int pages = (size + (device_addr & ~PAGE_MASK) + PAGE_SIZE - 1) >> PAGE_SHIFT;
 	int pos, err;
 
 	if (!mem)