ide: remove write-only hwif->hw

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c
index 875167e..71be699 100644
--- a/drivers/ide/setup-pci.c
+++ b/drivers/ide/setup-pci.c
@@ -387,14 +387,15 @@
 		return NULL;	/* no room in ide_hwifs[] */
 	if (hwif->io_ports[IDE_DATA_OFFSET] != base ||
 	    hwif->io_ports[IDE_CONTROL_OFFSET] != (ctl | 2)) {
-		memset(&hwif->hw, 0, sizeof(hwif->hw));
+		hw_regs_t hw;
+
+		memset(&hw, 0, sizeof(hw));
 #ifndef CONFIG_IDE_ARCH_OBSOLETE_INIT
-		ide_std_init_ports(&hwif->hw, base, (ctl | 2));
-		hwif->hw.io_ports[IDE_IRQ_OFFSET] = 0;
+		ide_std_init_ports(&hw, base, ctl | 2);
 #else
-		ide_init_hwif_ports(&hwif->hw, base, (ctl | 2), NULL);
+		ide_init_hwif_ports(&hw, base, ctl | 2, NULL);
 #endif
-		memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
+		memcpy(hwif->io_ports, hw.io_ports, sizeof(hwif->io_ports));
 		hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
 	}
 	hwif->chipset = d->chipset ? d->chipset : ide_pci;