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/buddha.c b/drivers/ide/buddha.c
index 9aa2cd9..0450652 100644
--- a/drivers/ide/buddha.c
+++ b/drivers/ide/buddha.c
@@ -160,7 +160,7 @@
 
 	while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
 		unsigned long board;
-		hw_regs_t hw[MAX_NUM_HWIFS], *hws[] = { NULL, NULL, NULL, NULL };
+		hw_regs_t hw[MAX_NUM_HWIFS], *hws[MAX_NUM_HWIFS];
 
 		if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
 			buddha_num_hwifs = BUDDHA_NUM_HWIFS;
@@ -224,7 +224,7 @@
 			hws[i] = &hw[i];
 		}
 
-		ide_host_add(&buddha_port_info, hws, NULL);
+		ide_host_add(&buddha_port_info, hws, i, NULL);
 	}
 
 	return 0;