ide: add hwif->ack_intr hook

* Add hwif->ack_intr hook and use it instead of hwif->hw.ack_intr.

* Add missing brackets to cris-v32 and powerpc ide_ack_intr() macros.

Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 9686cb4..1e6bf04 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -683,6 +683,8 @@
 	struct pci_dev  *pci_dev;	/* for pci chipsets */
 	struct ide_pci_device_s	*cds;	/* chipset device struct */
 
+	ide_ack_intr_t *ack_intr;
+
 	void (*rw_disk)(ide_drive_t *, struct request *);
 
 #if 0