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/pmac.c b/drivers/ide/pmac.c
index f76e4e6..f4f8064 100644
--- a/drivers/ide/pmac.c
+++ b/drivers/ide/pmac.c
@@ -1029,7 +1029,7 @@
 	const int *bidp;
 	struct ide_host *host;
 	ide_hwif_t *hwif;
-	hw_regs_t *hws[] = { hw, NULL, NULL, NULL };
+	hw_regs_t *hws[] = { hw };
 	struct ide_port_info d = pmac_port_info;
 	int rc;
 
@@ -1077,7 +1077,7 @@
 	/* Make sure we have sane timings */
 	sanitize_timings(pmif);
 
-	host = ide_host_alloc(&d, hws);
+	host = ide_host_alloc(&d, hws, 1);
 	if (host == NULL)
 		return -ENOMEM;
 	hwif = host->ports[0];