Swapping eth0 and eth1 on OK335xS board

/*******************************************************************************
*                   Swapping eth0 and eth1 on OK335xS board
* 声明：
*     有时候我们可能希望能够将eth0和eth1的名字换一下。
*
*                                          2015-9-30 阴 深圳 南山平山村 曾剑锋
******************************************************************************/

一、参考文档： https://e2e.ti.com/support/arm/sitara_arm/f/791/p/415084/1482324 
二、几种网卡接口的缩写全称：
Described in the following sections is the 3-port switch (3PSW) Ethernet subsystem.
The 3-port switch gigabit ethernet subsystem provides ethernet packet communication
and can be configured as an ethernet switch. It provides the gigabit media independent
interface (GMII),reduced gigabit media independent interface (RGMII), reduced media
independent interface (RMII), the management data input output (MDIO) for physical
layer device (PHY) management.

三、修改方法(etc/init.d/rc)：
......
#echo `ifconfig -a`
ifconfig eth0 down
ifconfig eth1 down
ip link set dev eth0 name eth2
ip link set dev eth1 name eth0
ip link set dev eth2 name eth1
ifconfig eth0 up
ifconfig eth1 up
#echo `ifconfig -a`
......