env: Rename eth_setenv_enetaddr() to eth_env_set_enetaddr()

Rename this function for consistency with env_set().

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/renesas/blanche/blanche.c b/board/renesas/blanche/blanche.c
index 5156eaf..e3262f7 100644
--- a/board/renesas/blanche/blanche.c
+++ b/board/renesas/blanche/blanche.c
@@ -421,7 +421,7 @@
 	if (!eth_getenv_enetaddr(STR_ENV_ETHADDR, eth_addr)) {
 		dev = eth_get_dev_by_index(0);
 		if (dev) {
-			eth_setenv_enetaddr(STR_ENV_ETHADDR, dev->enetaddr);
+			eth_env_set_enetaddr(STR_ENV_ETHADDR, dev->enetaddr);
 		} else {
 			printf("blanche: Couldn't get eth device\n");
 			rc = -1;