net: Move common init into a new eth_common.c file

Only half of the init is actually common. Move that part into a new common
file and call it from driver-model and legacy code. More common functions
will be added in future patches.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/net/eth_common.c b/net/eth_common.c
new file mode 100644
index 0000000..ee0b6df
--- /dev/null
+++ b/net/eth_common.c
@@ -0,0 +1,23 @@
+/*
+ * (C) Copyright 2001-2015
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ * Joe Hershberger, National Instruments
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <miiphy.h>
+#include "eth_internal.h"
+
+void eth_common_init(void)
+{
+	bootstage_mark(BOOTSTAGE_ID_NET_ETH_START);
+#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
+	miiphy_init();
+#endif
+
+#ifdef CONFIG_PHYLIB
+	phy_init();
+#endif
+}