[IA64] Fix wrong return value in parse_vector_domain

Fix wrong return value in parse_vector_domain().

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index 8c2bd81..9386b95 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -289,7 +289,7 @@
 		vector_domain_type = VECTOR_DOMAIN_PERCPU;
 		no_int_routing = 1;
 	}
-	return 1;
+	return 0;
 }
 early_param("vector", parse_vector_domain);
 #else