net: add opencore 10/100 ethernet mac driver

This patch ports the opencore 10/100 ethernet mac driver ethoc.c
from linux kernel to u-boot.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 1ec0ba1..0e68e52 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -39,6 +39,7 @@
 COBJS-$(CONFIG_EEPRO100) += eepro100.o
 COBJS-$(CONFIG_ENC28J60) += enc28j60.o
 COBJS-$(CONFIG_EP93XX) += ep93xx_eth.o
+COBJS-$(CONFIG_ETHOC) += ethoc.o
 COBJS-$(CONFIG_FEC_MXC) += fec_mxc.o
 COBJS-$(CONFIG_FSLDMAFEC) += fsl_mcdmafec.o mcfmii.o
 COBJS-$(CONFIG_FTMAC100) += ftmac100.o