* int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
Store the MAC address into the named environment variable. The return value is
-the same as the setenv() function.
+the same as the env_set() function.
uchar enetaddr[6] = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55 };
eth_setenv_enetaddr("ethaddr", enetaddr);
/* the "ethaddr" env var should now be set to "00:11:22:33:44:55" */