Moved initialization of AVR32 Ethernet controllers to board_eth_init()

Renamed initialization functions for atngw100 and atstk1000.
Removed initializations for these boards from net/eth.c

Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
diff --git a/board/atmel/atngw100/Makefile b/board/atmel/atngw100/Makefile
index 1b5c635..9f3849f 100644
--- a/board/atmel/atngw100/Makefile
+++ b/board/atmel/atngw100/Makefile
@@ -22,7 +22,7 @@
 
 LIB	:= $(obj)lib$(BOARD).a
 
-COBJS	:= $(BOARD).o eth.o
+COBJS	:= $(BOARD).o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))