warp7: Fix watchdog reset

The latest version of warp7 board provides the connection of the
WDOG1_B pin to the PMIC.

Program the watchdog to enable the WDOG1_B output which causes
a POR reset.

Based on the imx7dsabresd code.

Signed-off-by: Marco Franchi <marco.franchi@nxp.com>
Acked-by: Fabio Estevam <fabio.estevam@nxp.com>
diff --git a/include/configs/warp7.h b/include/configs/warp7.h
index f112fa5..8b9ed2b 100644
--- a/include/configs/warp7.h
+++ b/include/configs/warp7.h
@@ -19,6 +19,7 @@
 #define CONFIG_SYS_MALLOC_LEN		(32 * SZ_1M)
 
 #define CONFIG_BOARD_EARLY_INIT_F
+#define CONFIG_BOARD_LATE_INIT
 
 /* MMC Config*/
 #define CONFIG_SYS_FSL_ESDHC_ADDR       USDHC3_BASE_ADDR