uboot-imx

mx6ull: Fix WDOG3 base address

i.MX6ULL has the same WDOG3 base address as i.MX6UL, so take this
into account in the base address definition.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Stefano Babic <sbabic@denx.de>