Staging: octeon: Remove extern from .c file

This patch fixes the checkpatch.pl warning:

WARNING: externs should be avoided in .c files
+extern void octeon_mdiobus_force_mod_depencency(void);
Signed-off-by: Helen Fornazier <helen.fornazier@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/octeon/ethernet-mdio.h

@@ -40,5 +40,8 @@
 #endif /* CONFIG_XFRM */
 
 extern const struct ethtool_ops cvm_oct_ethtool_ops;
+
+extern void octeon_mdiobus_force_mod_depencency(void);
+
 int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 int cvm_oct_phy_setup_device(struct net_device *dev);

drivers/staging/octeon/ethernet.c

@@ -573,8 +573,6 @@ static const struct net_device_ops cvm_oct_pow_netdev_ops = {
 #endif
 };
 
-extern void octeon_mdiobus_force_mod_depencency(void);
-
 static struct device_node *cvm_oct_of_get_child(
 				const struct device_node *parent, int reg_val)
 {