imx: ventana: only pinmux FEC enet signals for boards using it

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/board/gateworks/gw_ventana/gw_ventana.c b/board/gateworks/gw_ventana/gw_ventana.c
index 9884616..2906dcc 100644
--- a/board/gateworks/gw_ventana/gw_ventana.c
+++ b/board/gateworks/gw_ventana/gw_ventana.c
@@ -397,11 +397,11 @@
 
 int board_eth_init(bd_t *bis)
 {
-	setup_iomux_enet();
-
 #ifdef CONFIG_FEC_MXC
-	if (board_type != GW551x && board_type != GW552x)
+	if (board_type != GW551x && board_type != GW552x) {
+		setup_iomux_enet();
 		cpu_eth_init(bis);
+	}
 #endif
 
 #ifdef CONFIG_E1000