ide: pass number of ports to ide_host_{alloc,add}() (v2)

Pass number of ports to ide_host_{alloc,add}() and then update
all users accordingly.

v2:
- drop no longer needed NULL initializers in buddha.c, cmd640.c and gayle.c
  (noticed by Sergei)

There should be no functional changes caused by this patch.

Acked-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 9e3aef3..9415f8c 100644
--- a/drivers/ide/scc_pata.c
+++ b/drivers/ide/scc_pata.c
@@ -559,7 +559,7 @@
 {
 	struct scc_ports *ports = pci_get_drvdata(dev);
 	struct ide_host *host;
-	hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
+	hw_regs_t hw, *hws[] = { &hw };
 	int i, rc;
 
 	memset(&hw, 0, sizeof(hw));
@@ -568,7 +568,7 @@
 	hw.irq = dev->irq;
 	hw.dev = &dev->dev;
 
-	rc = ide_host_add(d, hws, &host);
+	rc = ide_host_add(d, hws, 1, &host);
 	if (rc)
 		return rc;