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 --git a/drivers/ide/scc_pata.c b/drivers/ide/scc_pata.c
index 542419f..6e47eac 100644
--- a/drivers/ide/scc_pata.c
+++ b/drivers/ide/scc_pata.c
@@ -709,7 +709,7 @@
 	}
 
 	/* be sure we're looking at the low order bits */
-	scc_ide_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
+	scc_ide_outb(ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
 	if (cmd->tf_flags & IDE_TFLAG_IN_FEATURE)
 		tf->feature = scc_ide_inb(io_ports->feature_addr);
@@ -725,7 +725,7 @@
 		tf->device = scc_ide_inb(io_ports->device_addr);
 
 	if (cmd->tf_flags & IDE_TFLAG_LBA48) {
-		scc_ide_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
+		scc_ide_outb(ATA_HOB | ATA_DEVCTL_OBS, io_ports->ctl_addr);
 
 		if (cmd->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
 			tf->hob_feature = scc_ide_inb(io_ports->feature_addr);