ide-{floppy,tape}: merge pc->idefloppy_callback and pc->idetape_callback

Merge pc->idefloppy_callback and pc->idetape_callback into pc->callback.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 8936b21..f079456 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -640,8 +640,8 @@
 	 * to change/removal later.
 	 */
 	u8 pc_buf[256];
-	void (*idefloppy_callback) (ide_drive_t *);
-	void (*idetape_callback) (ide_drive_t *);
+
+	void (*callback)(ide_drive_t *);
 
 	/* idetape only */
 	struct idetape_bh *bh;