ide: add ide_pci_device_t.host_flags (take 2)

* Rename ide_pci_device_t.flags to ide_pci_device_t.host_flags
  and IDEPCI_FLAG_ISA_PORTS flag to IDE_HFLAG_ISA_PORTS.

* Add IDE_HFLAG_SINGLE flag for single channel devices.

* Convert core code and all IDE PCI drivers to use IDE_HFLAG_SINGLE
  and remove no longer needed ide_pci_device_t.channels field.

v2:
* Fix issues noticed by Sergei:
  - correct code alignment in scc_pata.c
  - s/IDE_HFLAG_SINGLE/~IDE_HFLAG_SINGLE/ in serverworks.c

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/pci/piix.c b/drivers/ide/pci/piix.c
index 1372c35..a4f88d2 100644
--- a/drivers/ide/pci/piix.c
+++ b/drivers/ide/pci/piix.c
@@ -495,7 +495,6 @@
 		.name		= name_str,		\
 		.init_chipset	= init_chipset_piix,	\
 		.init_hwif	= init_hwif_piix,	\
-		.channels	= 2,			\
 		.autodma	= AUTODMA,		\
 		.enablebits	= {{0x41,0x80,0x80}, {0x43,0x80,0x80}}, \
 		.bootable	= ON_BOARD,		\
@@ -514,11 +513,10 @@
 		 */
 		.name		= "MPIIX",
 		.init_hwif	= init_hwif_piix,
-		.channels	= 2,
 		.autodma	= NODMA,
 		.enablebits	= {{0x6d,0xc0,0x80}, {0x6d,0xc0,0xc0}},
 		.bootable	= ON_BOARD,
-		.flags		= IDEPCI_FLAG_ISA_PORTS
+		.host_flags	= IDE_HFLAG_ISA_PORTS,
 	},
 
 	/*  3 */ DECLARE_PIIX_DEV("PIIX3", 0x00),	/* no udma */