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/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index 16a6a69..058b2f6 100644
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -766,7 +766,7 @@
 	if (ofnode_valid(dev_ofnode(parent)))
 		pci_dev_find_ofnode(parent, bdf, &node);
 
-	if (ofnode_valid(node) && !ofnode_is_available(node)) {
+	if (ofnode_valid(node) && !ofnode_is_enabled(node)) {
 		debug("%s: Ignoring disabled device\n", __func__);
 		return log_msg_ret("dis", -EPERM);
 	}