libata: fix translation of concurrent positioning ranges

libata: fix translation of concurrent positioning ranges

Fixing the page length in the SCSI translation for the concurrent
positioning ranges VPD page. It was writing starting in offset 3
rather than offset 2 where the MSB is supposed to start for
the VPD page length.

Cc: [email protected]
Fixes: fe22e1c2f705 ("libata: support concurrent positioning ranges log")
Signed-off-by: Tyler Erickson <[email protected]>
Reviewed-by: Muhammad Ahmad <[email protected]>
Tested-by: Michael English <[email protected]>
Reviewed-by: Hannes Reinecke <[email protected]>
Signed-off-by: Damien Le Moal <[email protected]>