imx: imx8mm/imx8mn_beacon: Remove redundant code

The Ethernet controller and PHY use the device tree info to
configure themselves, so it's not necessary to manually do it
in the board file.  This permits the removal of a bunch of headers
as well.

Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Acked-by: Peng Fan <peng.fan@nxp.com>
diff --git a/board/beacon/imx8mm/imx8mm_beacon.c b/board/beacon/imx8mm/imx8mm_beacon.c
index c228bbf..204235a 100644
--- a/board/beacon/imx8mm/imx8mm_beacon.c
+++ b/board/beacon/imx8mm/imx8mm_beacon.c
@@ -1,52 +1,13 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
- * Copyright 2020 Compass Electronics Group, LLC
+ * Copyright 2022 Logic PD, Inc. dba Beacon EmbeddedWorks
  */
 
-#include <common.h>
-#include <miiphy.h>
-#include <netdev.h>
 #include <asm/global_data.h>
 
-#include <asm/arch/clock.h>
-#include <asm/arch/sys_proto.h>
-#include <asm/io.h>
-
 DECLARE_GLOBAL_DATA_PTR;
 
-#if IS_ENABLED(CONFIG_FEC_MXC)
-static int setup_fec(void)
-{
-	struct iomuxc_gpr_base_regs *gpr =
-		(struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;
-
-	/* Use 125M anatop REF_CLK1 for ENET1, not from external */
-	clrsetbits_le32(&gpr->gpr[1], 0x2000, 0);
-
-	return 0;
-}
-
-int board_phy_config(struct phy_device *phydev)
-{
-	/* enable rgmii rxc skew and phy mode select to RGMII copper */
-	phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x1f);
-	phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x8);
-
-	phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x00);
-	phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x82ee);
-	phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x05);
-	phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, 0x100);
-
-	if (phydev->drv->config)
-		phydev->drv->config(phydev);
-	return 0;
-}
-#endif
-
 int board_init(void)
 {
-	if (IS_ENABLED(CONFIG_FEC_MXC))
-		setup_fec();
-
 	return 0;
 }