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/net/mscc_eswitch/felix_switch.c b/drivers/net/mscc_eswitch/felix_switch.c
index 709c9e3..2e5f45e 100644
--- a/drivers/net/mscc_eswitch/felix_switch.c
+++ b/drivers/net/mscc_eswitch/felix_switch.c
@@ -287,7 +287,7 @@
 	int err;
 
 	if (ofnode_valid(dev_ofnode(dev)) &&
-	    !ofnode_is_available(dev_ofnode(dev))) {
+	    !ofnode_is_enabled(dev_ofnode(dev))) {
 		dev_dbg(dev, "switch disabled\n");
 		return -ENODEV;
 	}