ata: pata_piccolo: 'ata_tosh_init()' is misnamed in its header

ata: pata_piccolo: 'ata_tosh_init()' is misnamed in its header

Fixes the following W=1 kernel build warning(s):

 drivers/ata/pata_piccolo.c:87: warning: expecting prototype for ata_tosh_init(). Prototype was for ata_tosh_init_one() instead

Cc: Jens Axboe <axboe@kernel.dk>
Cc: Andre Hedrick <andre@linux-ide.org>
Cc: Hat Inc <alan@redhat.com>
Cc: linux-ide@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20210318085150.3131936-8-lee.jones@linaro.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>