net: phy: ste10Xp: Remove wrong SUPPORTED_Pause

The PHY driver should not indicate that Pause is supported. It is upto
the MAC drive enable it, if it supports Pause frames. So remove it
from the ste10Xp driver.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>