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>
2 files changed