[libata] More PATA driver ->cable_detect support

Roll-up of ->cable_detect feature addition patches, authored and
signed-off-by Alan Cox.

Signed-off-by: Jeff Garzik <jeff@garzik.org>

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

diff --cc drivers/ata/pata_cmd64x.c
Simple merge

diff --cc drivers/ata/pata_cs5520.c
Simple merge

diff --cc drivers/ata/pata_cs5530.c
Simple merge

diff --cc drivers/ata/pata_hpt3x3.c
Simple merge

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

diff --cc drivers/ata/pata_ixp4xx_cf.c
Simple merge

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