phylib: Fix some sparse warnings

Declared some things static, declared some things in the header.

Signed-off-by: Andy Fleming <[e-mail]>
Signed-off-by: Jeff Garzik <[e-mail]>

drivers/net/phy/phy.c

···
  * Must not be called from interrupt context, or while the
  * phydev->lock is held.
  */
-void phy_error(struct phy_device *phydev)
+static void phy_error(struct phy_device *phydev)
 {
 	mutex_lock(&phydev->lock);
 	phydev->state = PHY_HALTED;

include/linux/phy.h

···
 void mdiobus_unregister(struct mii_bus *bus);
 void phy_sanitize_settings(struct phy_device *phydev);
 int phy_stop_interrupts(struct phy_device *phydev);
+int phy_enable_interrupts(struct phy_device *phydev);
+int phy_disable_interrupts(struct phy_device *phydev);
 
 static inline int phy_read_status(struct phy_device *phydev) {
 	return phydev->drv->read_status(phydev);
···
 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
 		int (*run)(struct phy_device *));
 int phy_scan_fixups(struct phy_device *phydev);
+
+int __init mdio_bus_init(void);
+void mdio_bus_exit(void);
 
 extern struct bus_type mdio_bus_type;
 #endif /* __PHY_H */