lwip: fix code style issues

Fix various code style issues in the lwIP code.

Reported-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/cmd/net-common.c b/cmd/net-common.c
index 1c9fb83..1c6f11c 100644
--- a/cmd/net-common.c
+++ b/cmd/net-common.c
@@ -101,9 +101,6 @@
 	return cp->cmd(cmdtp, flag, argc, argv);
 }
 
-U_BOOT_CMD(
-	net, 3, 1, do_net,
-	"NET sub-system",
-	"list - list available devices\n"
-	"stats <device> - dump statistics for specified device\n"
-);
+U_BOOT_CMD(net, 3, 1, do_net, "NET sub-system",
+	   "list - list available devices\n"
+	   "stats <device> - dump statistics for specified device\n");