ide: add IDE_HFLAG_BOOTABLE host flag

Add IDE_HFLAG_BOOTABLE host flag and IDE_HFLAG_OFF_BOARD define.  Convert
all host drivers using ide_pci_device_t to use IDE_HFLAG_{BOOTABLE,OFF_BOARD}
instead of d->bootable and then remove no longer needed d->bootable.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c
index 3d101f7..d5901ec 100644
--- a/drivers/ide/setup-pci.c
+++ b/drivers/ide/setup-pci.c
@@ -360,6 +360,7 @@
 {
 	unsigned long ctl = 0, base = 0;
 	ide_hwif_t *hwif;
+	u8 bootable = (d->host_flags & IDE_HFLAG_BOOTABLE) ? 1 : 0;
 
 	if ((d->host_flags & IDE_HFLAG_ISA_PORTS) == 0) {
 		/*  Possibly we should fail if these checks report true */
@@ -380,7 +381,7 @@
 		ctl = port ? 0x374 : 0x3f4;
 		base = port ? 0x170 : 0x1f0;
 	}
-	if ((hwif = ide_match_hwif(base, d->bootable, d->name)) == NULL)
+	if ((hwif = ide_match_hwif(base, bootable, d->name)) == NULL)
 		return NULL;	/* no room in ide_hwifs[] */
 	if (hwif->io_ports[IDE_DATA_OFFSET] != base ||
 	    hwif->io_ports[IDE_CONTROL_OFFSET] != (ctl | 2)) {