net: pch_gbe: Make probe/remove static

These two routines are internal to pch_gbe driver.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

drivers/net/pch_gbe.c

@@ -429,7 +429,7 @@ static int pch_gbe_phy_init(struct udevice *dev)
 	return 0;
 }
 
-int pch_gbe_probe(struct udevice *dev)
+static int pch_gbe_probe(struct udevice *dev)
 {
 	struct pch_gbe_priv *priv;
 	struct eth_pdata *plat = dev_get_platdata(dev);
@@ -464,7 +464,7 @@ int pch_gbe_probe(struct udevice *dev)
 	return pch_gbe_phy_init(dev);
 }
 
-int pch_gbe_remove(struct udevice *dev)
+static int pch_gbe_remove(struct udevice *dev)
 {
 	struct pch_gbe_priv *priv = dev_get_priv(dev);