ide: convert ide_hwif_t.mmio into flag (v2)

All users of ->mmio == 1 are gone so convert ->mmio into flag.

Noticed by Alan Cox.

v2:
* updated for scc_pata

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

diff --git a/drivers/ide/ppc/scc_pata.c b/drivers/ide/ppc/scc_pata.c
index de91108..f05117e 100644
--- a/drivers/ide/ppc/scc_pata.c
+++ b/drivers/ide/ppc/scc_pata.c
@@ -668,7 +668,7 @@
 	hwif->irq = hwif->pci_dev->irq;
 	hwif->dma_base = dma_base;
 	hwif->config_data = ports->ctl;
-	hwif->mmio = 2;
+	hwif->mmio = 1;
 }
 
 /**