net: sfp: remove incomplete 100BASE-FX and 100BASE-LX support

The 100BASE-FX and 100BASE-LX support assumes a PHY is present; this
is probably an incorrect assumption. In any case, sfp_parse_support()
will fail such a module. Let's stop pretending we support these
modules.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/sfp-bus.c

@@ -342,9 +342,7 @@ phy_interface_t sfp_select_interface(struct sfp_bus *bus,
 	if (phylink_test(link_modes, 2500baseX_Full))
 		return PHY_INTERFACE_MODE_2500BASEX;
 
-	if (id->base.e1000_base_t ||
-	    id->base.e100_base_lx ||
-	    id->base.e100_base_fx)
+	if (id->base.e1000_base_t)
 		return PHY_INTERFACE_MODE_SGMII;
 
 	if (phylink_test(link_modes, 1000baseX_Full))

drivers/net/phy/sfp.c

@@ -1489,18 +1489,7 @@ static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn)
 
 static void sfp_sm_probe_for_phy(struct sfp *sfp)
 {
-	/* Setting the serdes link mode is guesswork: there's no
-	 * field in the EEPROM which indicates what mode should
-	 * be used.
-	 *
-	 * If it's a gigabit-only fiber module, it probably does
-	 * not have a PHY, so switch to 802.3z negotiation mode.
-	 * Otherwise, switch to SGMII mode (which is required to
-	 * support non-gigabit speeds) and probe for a PHY.
-	 */
-	if (sfp->id.base.e1000_base_t ||
-	    sfp->id.base.e100_base_lx ||
-	    sfp->id.base.e100_base_fx)
+	if (sfp->id.base.e1000_base_t)
 		sfp_sm_probe_phy(sfp);
 }