Moved initialization of FSL_MCDMAFEC Ethernet driver to CPU directory

Added a cpu_eth_init() function to cpu/mcf547x_8x directory and
removed code from net/eth.c

Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/drivers/net/fsl_mcdmafec.c b/drivers/net/fsl_mcdmafec.c
index f2bdba6..e34975a 100644
--- a/drivers/net/fsl_mcdmafec.c
+++ b/drivers/net/fsl_mcdmafec.c
@@ -582,5 +582,5 @@
 	/* default speed */
 	bis->bi_ethspeed = 10;
 
-	return 1;
+	return 0;
 }