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/sgiioc4.c b/drivers/ide/sgiioc4.c
index 676d41c..3f8ee35 100644
--- a/drivers/ide/sgiioc4.c
+++ b/drivers/ide/sgiioc4.c
@@ -546,7 +546,7 @@
 	unsigned long cmd_base, irqport;
 	unsigned long bar0, cmd_phys_base, ctl;
 	void __iomem *virt_base;
-	hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
+	hw_regs_t hw, *hws[] = { &hw };
 	int rc;
 
 	/*  Get the CmdBlk and CtrlBlk Base Registers */
@@ -580,7 +580,7 @@
 	/* Initializing chipset IRQ Registers */
 	writel(0x03, (void __iomem *)(irqport + IOC4_INTR_SET * 4));
 
-	rc = ide_host_add(&sgiioc4_port_info, hws, NULL);
+	rc = ide_host_add(&sgiioc4_port_info, hws, 1, NULL);
 	if (!rc)
 		return 0;