scripts: imx-image: rename dcdofs to ivtofs ...

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>

i.MX/DCD compiler and interpreter: logic is different ...

Reading the manual more carefully discovers a different logic for the
DCD 'check' command. They use the term "until". In order to get the
manual and the software in sync, this change switches to the term
"until" as well. Changing must happen at compiler and interpreter level
to make it work.

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

scripts imx-image: add DCD NOP command support ...

The DCD NOP command is available for all flash header v2 devices (i.MX28,
50, 53, 6 and 7).

Signed-off-by: Alexander Kurz <akurz@blala.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

scripts: imx: support set_bits/clear_bits ...

The i.MX SoCs support setting bits and clearing bits in their DCD table.
This adds commands for these in the imx-image tool.

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

scripts: Add imx-usb-loader tool ...

This adds host tools for i.MX to generate the i.MX internal
flash header format and a tool to upload these images to an
i.MX SoC via USB.

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