dm: core: Drop ofnode_is_available()

This function is also available as ofnode_is_enabled(), so use that
instead.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/firmware/scmi/scmi_agent-uclass.c b/drivers/firmware/scmi/scmi_agent-uclass.c
index 2b6211c..c3f3d1f 100644
--- a/drivers/firmware/scmi/scmi_agent-uclass.c
+++ b/drivers/firmware/scmi/scmi_agent-uclass.c
@@ -65,7 +65,7 @@
 		struct driver *drv = NULL;
 		u32 protocol_id;
 
-		if (!ofnode_is_available(node))
+		if (!ofnode_is_enabled(node))
 			continue;
 
 		if (ofnode_read_u32(node, "reg", &protocol_id))