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/sunxi/board.c b/board/sunxi/board.c
index 92fa6c8..26732dc 100644
--- a/board/sunxi/board.c
+++ b/board/sunxi/board.c
@@ -705,7 +705,7 @@
 			mac_addr[4] = (sid[3] >>  8) & 0xff;
 			mac_addr[5] = (sid[3] >>  0) & 0xff;
 
-			eth_setenv_enetaddr(ethaddr, mac_addr);
+			eth_env_set_enetaddr(ethaddr, mac_addr);
 		}
 
 		if (!getenv("serial#")) {