sh: r2dplus: Enable board_eth_init only for non-DM case

The board_eth_init() is not used for DM case, enable it only for
the non-DM case. This function should eventually be removed.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

board/renesas/r2dplus/r2dplus.c

@@ -46,7 +46,9 @@ void ide_set_reset(int idereset)
 	}
 }
 
+#ifndef CONFIG_DM_ETH
 int board_eth_init(bd_t *bis)
 {
 	return pci_eth_init(bis);
 }
+#endif