Fix a lock problem in generic phy code

Lock debugging finds a problem in phy.c and phy_device.c,
this patch fixes it. Tested on an AT91SAM9263-EK board,
kernel 2.6.23-rc4.

Signed-off-by: Hans J. Koch <hjk@linutronix.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index e323efd..0cc4369 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -755,7 +755,7 @@
  */
 void phy_start(struct phy_device *phydev)
 {
-	spin_lock(&phydev->lock);
+	spin_lock_bh(&phydev->lock);
 
 	switch (phydev->state) {
 		case PHY_STARTING:
@@ -769,7 +769,7 @@
 		default:
 			break;
 	}
-	spin_unlock(&phydev->lock);
+	spin_unlock_bh(&phydev->lock);
 }
 EXPORT_SYMBOL(phy_stop);
 EXPORT_SYMBOL(phy_start);