ide-tape: unwrap idetape_queue_pc_tail()

idetape_queue_pc_tail() is a wrapper for its __idetape_queue_pc_tail() counterpart
and has no other functionality. Remove it and call the "wrapped" function
directly.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>