This renames the dcdofs config option in the imx-image tool to ivtofs.  dcdofs
is a misnomer. The DCD (Device Configuration Data) is only one part of the data
linked into the IVT (Image Vector Table), but the meaning of the option is
really the latter, not the former.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Add support for the following ZII i.MX8MQ based boards:

   - ZII i.MX8MQ RMB3
   - ZII i.MX8MQ Zest

Most of the basic peripherals are supported by this patch. More
advanced features such as PCIe, display support, etc, are planned to
be added later.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>