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/kosagi/novena/novena.c b/board/kosagi/novena/novena.c
index 980cd62..baca722 100644
--- a/board/kosagi/novena/novena.c
+++ b/board/kosagi/novena/novena.c
@@ -264,7 +264,7 @@
 	}
 
 	/* Set ethernet address from EEPROM. */
-	eth_setenv_enetaddr("ethaddr", data.mac);
+	eth_env_set_enetaddr("ethaddr", data.mac);
 
 	return ret;
 }