pata_it8213: fix wrong PIO timings being programmed
* do not clear PIO timings for master when programming slave * program new PIO timings in the correct register nibble Both changes should be safe as this is how we have been doing things in IDE it8213 host driver for years. Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
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