drivers/net/*.c: Use static const

Using static const generally increases object text and decreases data size.
It also generally decreases overall object size.

Signed-off-by: Joe Perches <joe@perches.com>
diff --git a/drivers/net/ni52.c b/drivers/net/ni52.c
index 33618edc..d973fc6 100644
--- a/drivers/net/ni52.c
+++ b/drivers/net/ni52.c
@@ -388,9 +388,9 @@
 struct net_device * __init ni52_probe(int unit)
 {
 	struct net_device *dev = alloc_etherdev(sizeof(struct priv));
-	static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
+	static const int ports[] = {0x300, 0x280, 0x360, 0x320, 0x340, 0};
+	const int *port;
 	struct priv *p;
-	int *port;
 	int err = 0;
 
 	if (!dev)