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/e2100.c b/drivers/net/e2100.c
index 06e72fb..94ec973 100644
--- a/drivers/net/e2100.c
+++ b/drivers/net/e2100.c
@@ -216,7 +216,7 @@
 		printk(" %02X", station_addr[i]);
 
 	if (dev->irq < 2) {
-		int irqlist[] = {15, 11, 10, 12, 5, 9, 3, 4};
+		static const int irqlist[] = {15, 11, 10, 12, 5, 9, 3, 4};
 		for (i = 0; i < ARRAY_SIZE(irqlist); i++)
 			if (request_irq (irqlist[i], NULL, 0, "bogus", NULL) != -EBUSY) {
 				dev->irq = irqlist[i];