imx: initialize fec only when enabled

board early initialize fec ethernet controller pinmux
only when FEC is enabled
Signed-off-by: NParthiban Nallathambi <pn@denx.de>
Reviewed-by: NPeng Fan <peng.fan@nxp.com>

board/phytec/pcl063/pcl063.c

@@ -178,7 +178,9 @@ int board_phy_config(struct phy_device *phydev)
 int board_early_init_f(void)
 {
 	setup_iomux_uart();
+#ifdef CONFIG_FEC_MXC
 	setup_iomux_fec();
+#endif
 
 	return 0;
 }