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/include/linux/ide.h b/include/linux/ide.h
index 349c22a..498dc57 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1244,7 +1244,8 @@
 
 enum {
 	/* Uses ISA control ports not PCI ones. */
-	IDEPCI_FLAG_ISA_PORTS		= (1 << 0),
+	IDE_HFLAG_ISA_PORTS		= (1 << 0),
+	IDE_HFLAG_SINGLE		= (1 << 1),
 };
 
 typedef struct ide_pci_device_s {
@@ -1256,13 +1257,12 @@
 	void                    (*init_hwif)(ide_hwif_t *);
 	void			(*init_dma)(ide_hwif_t *, unsigned long);
 	void			(*fixup)(ide_hwif_t *);
-	u8			channels;
 	u8			autodma;
 	ide_pci_enablebit_t	enablebits[2];
 	u8			bootable;
 	unsigned int		extra;
 	struct ide_pci_device_s	*next;
-	u8			flags;
+	u8			host_flags;
 	u8			udma_mask;
 } ide_pci_device_t;