drivers/net/*/: 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/benet/be_ethtool.c b/drivers/net/benet/be_ethtool.c
index 0f46366..b4be027 100644
--- a/drivers/net/benet/be_ethtool.c
+++ b/drivers/net/benet/be_ethtool.c
@@ -549,7 +549,9 @@
 {
 	int ret, i;
 	struct be_dma_mem ddrdma_cmd;
-	u64 pattern[2] = {0x5a5a5a5a5a5a5a5aULL, 0xa5a5a5a5a5a5a5a5ULL};
+	static const u64 pattern[2] = {
+		0x5a5a5a5a5a5a5a5aULL, 0xa5a5a5a5a5a5a5a5ULL
+	};
 
 	ddrdma_cmd.size = sizeof(struct be_cmd_req_ddrdma_test);
 	ddrdma_cmd.va = pci_alloc_consistent(adapter->pdev, ddrdma_cmd.size,