net: phy: switch drivers to use dynamic feature detection

Recently genphy_read_abilities() has been added that dynamically detects
clause 22 PHY abilities. I *think* this detection should work with all
supported PHY's, at least for the ones with basic features sets, i.e.
PHY_BASIC_FEATURES and PHY_GBIT_FEATURES. So let's remove setting these
features explicitly and rely on phylib feature detection.

I don't have access to most of these PHY's, therefore I'd appreciate
regression testing.

v2:
- make the feature constant a comment so that readers know which
  features are supported by the respective PHY

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/dp83848.c

@@ -99,7 +99,7 @@ MODULE_DEVICE_TABLE(mdio, dp83848_tbl);
 		.phy_id		= _id,				\
 		.phy_id_mask	= 0xfffffff0,			\
 		.name		= _name,			\
-		.features	= PHY_BASIC_FEATURES,		\
+		/* PHY_BASIC_FEATURES */			\
 								\
 		.soft_reset	= genphy_soft_reset,		\
 		.config_init	= _config_init,			\