imx: ventana: add support for GW5906

The GW5906 is a GW552x with mechanical and power supply connector
differences.

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 fb81a96..da9f5d8 100644
--- a/board/gateworks/gw_ventana/gw_ventana.c
+++ b/board/gateworks/gw_ventana/gw_ventana.c
@@ -155,6 +155,7 @@
 	switch (board_type) {
 	case GW53xx:
 	case GW552x:
+	case GW5906:
 		gpio = (IMX_GPIO_NR(1, 9));
 		break;
 	case GW54proto: