Latest kernel couldn't probe DVD-Drive in Secondary/Slave

[MIHIRA Sanpei Yoshiro]

>  After updating kernel in -current machine, DVD-Drive in ATA
>Secondary/Slave was not probed.
>
>  If I back out sys/dev/ata/ata-lowlevel.c rev. 1.24, I could probe
>it.

  With sys/dev/ata/ata-lowlevel.c rev. 1.25, I could probe DVD-Drive
in ATA Secondary/Slave channel.

  Thank you, SOS.

  And I hope to commit this change into RELENG_5.2(for 5.2-RELEASE).

Cheers.
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MIHIRA, Sanpei Yoshiro
Tokyo, Japan.