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/wan/dscc4.c b/drivers/net/wan/dscc4.c
index d45b08d..34cff6c 100644
--- a/drivers/net/wan/dscc4.c
+++ b/drivers/net/wan/dscc4.c
@@ -1358,7 +1358,7 @@
 	return ret;
 }
 
-static int dscc4_match(struct thingie *p, int value)
+static int dscc4_match(const struct thingie *p, int value)
 {
 	int i;
 
@@ -1403,7 +1403,7 @@
 static int dscc4_encoding_setting(struct dscc4_dev_priv *dpriv,
 				  struct net_device *dev)
 {
-	struct thingie encoding[] = {
+	static const struct thingie encoding[] = {
 		{ ENCODING_NRZ,		0x00000000 },
 		{ ENCODING_NRZI,	0x00200000 },
 		{ ENCODING_FM_MARK,	0x00400000 },
@@ -1442,7 +1442,7 @@
 static int dscc4_crc_setting(struct dscc4_dev_priv *dpriv,
 			     struct net_device *dev)
 {
-	struct thingie crc[] = {
+	static const struct thingie crc[] = {
 		{ PARITY_CRC16_PR0_CCITT,	0x00000010 },
 		{ PARITY_CRC16_PR1_CCITT,	0x00000000 },
 		{ PARITY_CRC32_PR0_CCITT,	0x00000011 },