cmd: pxe_utils: Check fdtcontroladdr in label_boot

If using OF_CONTROL, fdtcontroladdr is set to the fdt used to configure
U-Boot. When using PXE, if no fdt is defined in the menu file, and
there is no fdt at fdt_addr, add fall back on fdtcontroladdr too.

We are developing board support for the Armv8r64 FVP using
config_distro_bootcmd. We are also using OF_BOARD and would like the
PXE boot option to default to the fdt provided by board_fdt_blob_setup.

Signed-off-by: Peter Hoyes <Peter.Hoyes@arm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Ramon Fried <rfried.dev@gmail.com>
diff --git a/drivers/net/tsec.c b/drivers/net/tsec.c
index 4354753..64bb42b 100644
--- a/drivers/net/tsec.c
+++ b/drivers/net/tsec.c
@@ -156,7 +156,7 @@
 	return 0;
 }
 
-static int tsec_set_promisc(struct udevice *dev, bool enable)
+static int __maybe_unused tsec_set_promisc(struct udevice *dev, bool enable)
 {
 	struct tsec_private *priv = dev_get_priv(dev);
 	struct tsec __iomem *regs = priv->regs;