arm: ls1021atwr: Convert to use driver model TSEC driver

Now that we have added driver model support to the TSEC driver,
convert ls1021atwr board to use it.

This depends on previous DM series for ls1021atwr:
http://patchwork.ozlabs.org/patch/561855/

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

[Vladimir] Made the following changes:
- Added 'status = "disabled";' for all Ethernet ports in ls1021a.dtsi
- Fixed the confusion between the SGMII/TBI PCS for enet0 and enet1 -
  a mistake ported over from Linux. Each SGMII PCS lies on the private
  MDIO bus of the interface (and the RGMII enet2 has no SGMII PCS).
- Added CONFIG_DM_ETH to all ls1021atwr_* defconfigs
- Completely removed non-DM_ETH support from ls1021atwr
- Changed "compatible" string from "fsl,tsec-mdio" to "fsl,etsec2-mdio"
  and from "fsl,tsec" to "fsl,etsec2" to match Linux
diff --git a/arch/arm/cpu/armv7/ls102xa/fdt.c b/arch/arm/cpu/armv7/ls102xa/fdt.c
index 8bf9c42..1aadfff 100644
--- a/arch/arm/cpu/armv7/ls102xa/fdt.c
+++ b/arch/arm/cpu/armv7/ls102xa/fdt.c
@@ -16,12 +16,17 @@
 #include <tsec.h>
 #include <asm/arch/immap_ls102xa.h>
 #include <fsl_sec.h>
+#include <dm.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
 void ft_fixup_enet_phy_connect_type(void *fdt)
 {
+#ifdef CONFIG_DM_ETH
+	struct udevice *dev;
+#else
 	struct eth_device *dev;
+#endif
 	struct tsec_private *priv;
 	const char *enet_path, *phy_path;
 	char enet[16];
@@ -29,7 +34,12 @@
 	int phy_node;
 	int i = 0;
 	uint32_t ph;
+#ifdef CONFIG_DM_ETH
+	char *name[3] = { "ethernet@2d10000", "ethernet@2d50000",
+			  "ethernet@2d90000" };
+#else
 	char *name[3] = { "eTSEC1", "eTSEC2", "eTSEC3" };
+#endif
 
 	for (; i < ARRAY_SIZE(name); i++) {
 		dev = eth_get_dev_by_name(name[i]);