net: phy: make phy_suspend a no-op if PHY is suspended already

Gently handle the case that phy_suspend() is called whilst PHY is in
power-down.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 file changed