PCI/pwrctrl: Fix pci_pwrctrl_is_required() device node leak

The for_each_endpoint_of_node() macro requires calling of_node_put() on the
endpoint node when breaking out of the loop early.

Add of_node_put(endpoint) before the early return to release the reference.

Fixes: cf3287f ("PCI/pwrctrl: Ensure that remote endpoint node parent has supply requirement")
Signed-off-by: Felix Gu <ustc.gu@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20260323-pwctrl-v1-1-f5c03a2df7fb@gmail.com

Author: outman119

drivers/pci/pwrctrl/core.c

@@ -299,8 +299,10 @@ static bool pci_pwrctrl_is_required(struct device_node *np)
 			struct device_node *remote __free(device_node) =
 				of_graph_get_remote_port_parent(endpoint);
 			if (remote) {
-				if (of_pci_supply_present(remote))
+				if (of_pci_supply_present(remote)) {
+					of_node_put(endpoint);
 					return true;
+				}
 			}
 		}
 	}