net: cosmetic: Name ethaddr variables consistently

Use "_ethaddr" at the end of variables and drop CamelCase.
Make constant values actually 'const'.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/board/davinci/da8xxevm/da850evm.c b/board/davinci/da8xxevm/da850evm.c
index b9ca38e..b82385a 100644
--- a/board/davinci/da8xxevm/da850evm.c
+++ b/board/davinci/da8xxevm/da850evm.c
@@ -145,7 +145,7 @@
 	 */
 	if (!enetaddr_found) {
 		if (!spi_mac_read) {
-			if (is_valid_ether_addr(buff)) {
+			if (is_valid_ethaddr(buff)) {
 				if (eth_setenv_enetaddr("ethaddr", buff)) {
 					printf("Warning: Failed to "
 					"set MAC address from SPI flash\n");
@@ -160,8 +160,8 @@
 		 * MAC address present in environment compare it with
 		 * the MAC address in SPI flash and warn on mismatch
 		 */
-		if (!spi_mac_read && is_valid_ether_addr(buff) &&
-						memcmp(env_enetaddr, buff, 6))
+		if (!spi_mac_read && is_valid_ethaddr(buff) &&
+		    memcmp(env_enetaddr, buff, 6))
 			printf("Warning: MAC address in SPI flash don't match "
 					"with the MAC address in the environment\n");
 			printf("Default using MAC address from environment\n");