ata: pata_macio: Remove unneeded word in comments

There is unneeded word "to" in line 669, so remove it.

Signed-off-by: Shaomin Deng <dengshaomin@cdjrlc.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>