dm: eth: Do not print misleading "Net Initialization Skipped"

With driver model, board_eth_init() or cpu_eth_init() is not a must.
Thus we don't need print a misleading "Net Initialization Skipped".

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

net/eth.c

@@ -107,7 +107,9 @@ static void eth_common_init(void)
 		if (cpu_eth_init(gd->bd) < 0)
 			printf("CPU Net Initialization Failed\n");
 	} else {
+#ifndef CONFIG_DM_ETH
 		printf("Net Initialization Skipped\n");
+#endif
 	}
 }