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>

drivers/ide/pci/atiixp.c

@@ -204,15 +204,14 @@ static ide_pci_device_t atiixp_pci_info[] __devinitdata = {
 		.init_hwif	= init_hwif_atiixp,
 		.autodma	= AUTODMA,
 		.enablebits	= {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
-		.bootable	= ON_BOARD,
+		.host_flags	= IDE_HFLAG_BOOTABLE,
 		.pio_mask	= ATA_PIO4,
 	},{	/* 1 */
 		.name		= "SB600_PATA",
 		.init_hwif	= init_hwif_atiixp,
 		.autodma	= AUTODMA,
 		.enablebits	= {{0x48,0x01,0x00}, {0x00,0x00,0x00}},
- 		.bootable	= ON_BOARD,
- 		.host_flags	= IDE_HFLAG_SINGLE,
+ 		.host_flags	= IDE_HFLAG_SINGLE | IDE_HFLAG_BOOTABLE,
 		.pio_mask	= ATA_PIO4,
  	},
 };