ata: use dev_get_platdata()

Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --cc drivers/ata/pata_at32.c
Simple merge

diff --cc drivers/ata/pata_at91.c
Simple merge

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

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

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

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

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

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