ide-disk: move all ioctl handling to ide-disk_ioctl.c

While at it:
- idedisk_ioctl() -> ide_disk_ioctl()

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-disk.h b/drivers/ide/ide-disk.h
new file mode 100644
index 0000000..7f00785
--- /dev/null
+++ b/drivers/ide/ide-disk.h
@@ -0,0 +1,25 @@
+#ifndef __IDE_DISK_H
+#define __IDE_DISK_H
+
+struct ide_disk_obj {
+	ide_drive_t	*drive;
+	ide_driver_t	*driver;
+	struct gendisk	*disk;
+	struct kref	kref;
+	unsigned int	openers;	/* protected by BKL for now */
+};
+
+#define ide_disk_g(disk) \
+	container_of((disk)->private_data, struct ide_disk_obj, driver)
+
+/* ide-disk.c */
+ide_decl_devset(address);
+ide_decl_devset(multcount);
+ide_decl_devset(nowerr);
+ide_decl_devset(wcache);
+ide_decl_devset(acoustic);
+
+/* ide-disk_ioctl.c */
+int ide_disk_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
+
+#endif /* __IDE_DISK_H */