net: ti: cpsw: Move cpsw_phy_sel() to _probe()

cpsw_phy_sel() is a configuration step that should not be in
ofdata_to_platdata(). Add phy_sel_compat to the cpsw_platform_data
structure so that it is accessible in _probe. Then move the call of
cpsw_phy_sel() to _probe.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>

include/cpsw.h

@@ -50,6 +50,7 @@ struct cpsw_platform_data {
 	u32	active_slave;
 	bool	rmii_clock_external;
 	u8	version;
+	const char *phy_sel_compat;
 };
 
 int cpsw_register(struct cpsw_platform_data *data);