Revert "net: ti cpsw ethernet: allow reading phy interface mode from DT"

This reverts commit d7559982.

It wasn't meant to be applied, commit
342b7b74 ("net: ti cpsw ethernet: set
IFCTL_A bit in MACCONTROL") was redone in such a way to make this
commit unnecessary.
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/cpsw.txt

@@ -25,8 +25,6 @@ Required properties:
 - slave_reg_ofs		: Specifies slave register offset
 - sliver_reg_ofs	: Specifies slave sliver register offset
 - phy_id		: Specifies slave phy id
-- phy_if_mode		: Specified slave phy interface mode (optional)
-			  (one of the PHY_INTERFACE_MODE_* as numerical value)
 - mac-address		: Specifies slave MAC address
 
 Optional properties:
@@ -64,7 +62,6 @@ Examples:
 			slave_reg_ofs = <0x208>;
 			sliver_reg_ofs = <0xd80>;
 			phy_id = "davinci_mdio.16:00";
-			phy_if_mode = <6>; /* PHY_INTERFACE_MODE_RGMII */
 			/* Filled in by U-Boot */
 			mac-address = [ 00 00 00 00 00 00 ];
 		};

drivers/net/ethernet/ti/cpsw.c

@@ -855,9 +855,6 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data,
 		}
 		slave_data->sliver_reg_ofs = prop;
 
-		if (!of_property_read_u32(slave_node, "phy_if_mode", &prop))
-			slave_data->phy_if = prop;
-
 		mac_addr = of_get_mac_address(slave_node);
 		if (mac_addr)
 			memcpy(slave_data->mac_addr, mac_addr, ETH_ALEN);