ARM: imx: vining2000: Enable DM GPIO

Enable DM GPIO support on iMX6SX VINING|2000 and fix up
board code where applicable.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Silvio Fricke <silvio.fricke@softing.com>
Cc: Stefano Babic <sbabic@denx.de>
2 files changed