net: axi_ethernet: Add driver to u-boot

Add axi_ethernet driver for little-endian Microblaze.

RX/TX BDs and rxframe buffer are shared among all axi_ethernet MACs.
Only one MAC can work in one time.

Signed-off-by: Michal Simek <monstr@monstr.eu>
Acked-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 3f845d6..3f4f974 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -78,6 +78,7 @@
 COBJS-$(CONFIG_TSI108_ETH) += tsi108_eth.o
 COBJS-$(CONFIG_ULI526X) += uli526x.o
 COBJS-$(CONFIG_VSC7385_ENET) += vsc7385.o
+COBJS-$(CONFIG_XILINX_AXIEMAC) += xilinx_axi_emac.o
 COBJS-$(CONFIG_XILINX_EMACLITE) += xilinx_emaclite.o
 
 COBJS	:= $(sort $(COBJS-y))