ACPICA: Fix a regression for deletion of Alias() objects.

Fixes a regression introduced by commit e23d9b82 (ACPICA:
Namespace: Properly null terminate objects detached from a namespace
node)

In the case of Alias namespace nodes, the node simply points to the aliased
node via the Object field; thus we cannot assume that the object is an
operand object.

Fixes: e23d9b82 (ACPICA: Namespace: Properly null terminate objects detached from a namespace node)
Signed-off-by: NBob Moore <robert.moore@intel.com>
Signed-off-by: NLv Zheng <lv.zheng@intel.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/acpica/nsobject.c

@@ -237,18 +237,17 @@ void acpi_ns_detach_object(struct acpi_namespace_node *node)
 		    (node->object->common.type != ACPI_TYPE_LOCAL_DATA)) {
 			node->object = node->object->common.next_object;
 		}
-	}
 
 		/*
 		 * Detach the object from any data objects (which are still held by
 		 * the namespace node)
 		 */
-
 		if (obj_desc->common.next_object &&
 		    ((obj_desc->common.next_object)->common.type ==
 		     ACPI_TYPE_LOCAL_DATA)) {
 			obj_desc->common.next_object = NULL;
 		}
+	}
 
 	/* Reset the node type to untyped */