imx-image: Align image size ...

Several boot modes on i.MX can't cope with partial pages or
non word aligned image lengths, so align the size to 4k.

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

scripts: imx-image: allow semicolon as command delimiter ...

When we want to pass the imxcfg files through cpp we also want to
allow defines which define multiple commands. For this to work we
have to use an additional command delimiter as we can't pass '\n'
though cpp. Use ';' for this.

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

imx-usb-loader: Add i.MX6 Solo/DualLite support ...

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>