ide: remove ide_dma_iobase()

* ide_mapped_mmio_dma() and ide_iomio_dma() are called only by
  ide_dma_iobase() so inline them there.

* ide_dma_iobase() is called only by ide_setup_dma() so inline
  it there.

* Setup hwif->extra_base also if hwif->mmio flag is set.

There should be no functional changes casued by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-dma.c

@@ -838,38 +838,18 @@ static int ide_allocate_dma_engine(ide_hwif_t *hwif)
 	return 1;
 }
 
-static int ide_mapped_mmio_dma(ide_hwif_t *hwif, unsigned long base)
+void ide_setup_dma(ide_hwif_t *hwif, unsigned long base)
 {
-	printk(KERN_INFO "    %s: MMIO-DMA ", hwif->name);
-
-	return 0;
-}
+	u8 dma_stat;
 
-static int ide_iomio_dma(ide_hwif_t *hwif, unsigned long base)
-{
+	if (hwif->mmio)
+		printk(KERN_INFO "    %s: MMIO-DMA ", hwif->name);
+	else
 		printk(KERN_INFO "    %s: BM-DMA at 0x%04lx-0x%04lx",
 				 hwif->name, base, base + 7);
 
 	hwif->extra_base = base + (hwif->channel ? 8 : 16);
 
-	return 0;
-}
-
-static int ide_dma_iobase(ide_hwif_t *hwif, unsigned long base)
-{
-	if (hwif->mmio)
-		return ide_mapped_mmio_dma(hwif, base);
-
-	return ide_iomio_dma(hwif, base);
-}
-
-void ide_setup_dma(ide_hwif_t *hwif, unsigned long base)
-{
-	u8 dma_stat;
-
-	if (ide_dma_iobase(hwif, base))
-		return;
-
 	if (ide_allocate_dma_engine(hwif)) {
 		ide_release_dma_engine(hwif);
 		return;