Import DHCOM iMX6 PDK2 device tree from Linux 5.1.1 b724e9356404 .
Enable DT control in full U-Boot .
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Ludwig Zenz <lzenz@dh-electronics.com>
Cc: Stefano Babic <sbabic@denx.de>