imx: ventana: convert U-Boot to OF_CONTROL using FIT image

In preparation for dm conversion convert to OF_CONTROL by adding FIT image
support and multi dtb.

Add a board_fit_config_name_match to match the dtb based off of EEPROM
model.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/board/gateworks/gw_ventana/gsc.h b/board/gateworks/gw_ventana/gsc.h
index 6dcaafa..29d375b 100644
--- a/board/gateworks/gw_ventana/gsc.h
+++ b/board/gateworks/gw_ventana/gsc.h
@@ -67,5 +67,6 @@
 int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len);
 int gsc_info(int verbose);
 int gsc_boot_wd_disable(void);
+const char *gsc_get_dtb_name(int level, char *buf, int sz);
 #endif