libata: don't use ap->ioaddr in non-SFF drivers

ap->ioaddr is to carry addresses for TF and BMDMA registers of a SFF
controller, don't abuse it in non-SFF controllers.

Signed-off-by: Tejun Heo <htejun@gmail.com>

diff --cc drivers/ata/ahci.c
Simple merge

diff --cc drivers/ata/sata_fsl.c
Simple merge

diff --cc drivers/ata/sata_sil24.c
Simple merge