alpha: remove dma64_addr_t usage

dma_addr_t is always 64 bit on alpha. So let's use dma_addr_t instead.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c
index d1dbd9a..022c2748 100644
--- a/arch/alpha/kernel/pci_iommu.c
+++ b/arch/alpha/kernel/pci_iommu.c
@@ -223,7 +223,7 @@
  */
 static int pci_dac_dma_supported(struct pci_dev *dev, u64 mask)
 {
-	dma64_addr_t dac_offset = alpha_mv.pci_dac_offset;
+	dma_addr_t dac_offset = alpha_mv.pci_dac_offset;
 	int ok = 1;
 
 	/* If this is not set, the machine doesn't support DAC at all.  */
@@ -756,7 +756,7 @@
 	spin_lock_irqsave(&arena->lock, flags);
 
 	for (end = sg + nents; sg < end; ++sg) {
-		dma64_addr_t addr;
+		dma_addr_t addr;
 		size_t size;
 		long npages, ofs;
 		dma_addr_t tend;