env: Rename eth_getenv_enetaddr() to eth_env_get_enetaddr()

Rename this function for consistency with env_get().

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/net/ne2000_base.c b/drivers/net/ne2000_base.c
index f6e5eaf..fb088e0 100644
--- a/drivers/net/ne2000_base.c
+++ b/drivers/net/ne2000_base.c
@@ -715,12 +715,12 @@
 	 * to the MAC address value in the environment, so we do not read
 	 * it from the prom or eeprom if it is specified in the environment.
 	 */
-	if (!eth_getenv_enetaddr("ethaddr", dev->enetaddr)) {
+	if (!eth_env_get_enetaddr("ethaddr", dev->enetaddr)) {
 		/* If the MAC address is not in the environment, get it: */
 		if (!get_prom(dev->enetaddr, nic.base)) /* get MAC from prom */
 			dp83902a_init(dev->enetaddr);   /* fallback: seeprom */
 		/* And write it into the environment otherwise eth_write_hwaddr
-		 * returns -1 due to eth_getenv_enetaddr_by_index() failing,
+		 * returns -1 due to eth_env_get_enetaddr_by_index() failing,
 		 * and this causes "Warning: failed to set MAC address", and
 		 * cmd_bdinfo has no ethaddr value which it can show: */
 		eth_env_set_enetaddr("ethaddr", dev->enetaddr);