imx: ventana: add GW5904 support

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/board/gateworks/gw_ventana/eeprom.c b/board/gateworks/gw_ventana/eeprom.c
index 1382e5d..9a1033a 100644
--- a/board/gateworks/gw_ventana/eeprom.c
+++ b/board/gateworks/gw_ventana/eeprom.c
@@ -64,6 +64,7 @@
 	if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0)
 		baseboard = '0';
 
+	type = GW_UNKNOWN;
 	switch (baseboard) {
 	case '0': /* original GW5400-A prototype */
 		type = GW54proto;
@@ -91,10 +92,10 @@
 			type = GW553x;
 			break;
 		}
-		/* fall through */
-	default:
-		printf("EEPROM: Unknown model in EEPROM: %s\n", info->model);
-		type = GW_UNKNOWN;
+		break;
+	case '9':
+		if (info->model[4] == '0' && info->model[5] == '4')
+			type = GW5904;
 		break;
 	}
 	return type;