ata: pata_octeon_cf: remove DPRINTK() macro in interrupt context

There is only so much information to be glanced when the interrupt
routine is called and exited, so remove these DPRINTK() calls.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>