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/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 2058a6f..a9f3127 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -354,7 +354,7 @@
 	pc->req_xfer = 0;
 	pc->buf = pc->pc_buf;
 	pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
-	pc->idefloppy_callback = &ide_floppy_callback;
+	pc->callback = ide_floppy_callback;
 }
 
 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
@@ -438,7 +438,7 @@
 		if (floppy->failed_pc == pc)
 			floppy->failed_pc = NULL;
 		/* Command finished - Call the callback function */
-		pc->idefloppy_callback(drive);
+		pc->callback(drive);
 		return ide_stopped;
 	}
 
@@ -612,7 +612,7 @@
 		pc->error = IDEFLOPPY_ERROR_GENERAL;
 
 		floppy->failed_pc = NULL;
-		pc->idefloppy_callback(drive);
+		pc->callback(drive);
 		return ide_stopped;
 	}