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/ide-generic.c b/drivers/ide/ide-generic.c
index 0427759..0d40848 100644
--- a/drivers/ide/ide-generic.c
+++ b/drivers/ide/ide-generic.c
@@ -86,7 +86,7 @@
 
 static int __init ide_generic_init(void)
 {
-	hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
+	hw_regs_t hw, *hws[] = { &hw };
 	unsigned long io_addr;
 	int i, rc = 0, primary = 0, secondary = 0;
 
@@ -133,7 +133,7 @@
 #else
 			hw.irq = legacy_irqs[i];
 #endif
-			rc = ide_host_add(&ide_generic_port_info, hws, NULL);
+			rc = ide_host_add(&ide_generic_port_info, hws, 1, NULL);
 			if (rc) {
 				release_region(io_addr + 0x206, 1);
 				release_region(io_addr, 8);