net: Remove the bd* parameter from net stack functions

This value is not used by the network stack and is available in the
global data, so stop passing it around.  For the one legacy function
that still expects it (init op on old Ethernet drivers) pass in the
global pointer version directly to avoid changing that interface.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Reported-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
(Trival fix to remove an unneeded variable declaration in 4xx_enet.c)

board/egnite/ethernut5/ethernut5.c

@@ -204,7 +204,7 @@ int board_eth_init(bd_t *bis)
 		miiphy_write(devname, 0, MII_BMCR, BMCR_RESET);
 	}
 	/* Sync environment with network devices, needed for nfsroot. */
-	return eth_init(gd->bd);
+	return eth_init();
 }
 #endif