ide: use ATA_HOB

Make use of ATA_HOB instead of hard-coded value in the tf_read() method.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

diff --cc drivers/ide/at91_ide.c
Simple merge

diff --cc drivers/ide/ide-h8300.c
Simple merge

diff --cc drivers/ide/ide-io-std.c
Simple merge

diff --cc drivers/ide/ns87415.c
Simple merge

diff --cc drivers/ide/scc_pata.c
Simple merge

diff --cc drivers/ide/tx4938ide.c
Simple merge

diff --cc drivers/ide/tx4939ide.c
Simple merge