imx: ventana: add GSC boot watchdog disable to SPL

If the SPL is to be used for Falcon mode then we need to make sure the SPL
disable the GSC boot watchdog.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

board/gateworks/gw_ventana/gw_ventana_spl.c

@@ -527,6 +527,9 @@ void board_init_f(ulong dummy)
 	/* Clear the BSS. */
 	memset(__bss_start, 0, __bss_end - __bss_start);
 
+	/* disable boot watchdog */
+	gsc_boot_wd_disable();
+
 	/* load/boot image from boot device */
 	board_init_r(NULL, 0);
 }