At present we put the driver in the /chosen node in U-Boot. This is a bit
strange, since U-Boot doesn't normally use that node itself. It is better
to put it under the bootstd node.

To make this work we need to copy create the node under /chosen when
fixing up the device tree. Copy over all the properties so that fwupd
knows what to do.

Update the sandbox device tree accordingly.

Signed-off-by: Simon Glass <sjg@chromium.org>

We don't need the U-Boot prefix on the version and in fact it is harmful
since pytest gets confused seeing the U-Boot banner bring displayed when
the version is printed.

Drop the prefix from the string.

We could produce an entirely new string from the component parts, but this
adds to the rodata size and would break the use of version_string as the
only thing which holds this information.

Signed-off-by: Simon Glass <sjg@chromium.org>

This information needs to be set up by the bootstd tests as well. Move it
into a common function and ensure it is executed before any bootstd test
is run.

Make sure the 'images' parameter is set correctly for fixups.

Signed-off-by: Simon Glass <sjg@chromium.org>

This test can operate in all conditions now. Update the test and comments.

Signed-off-by: Simon Glass <sjg@chromium.org>

This function turns out to be a little confusing since it looks up a path
and also registers the tree. Split it into two, one that gets the root
node and one that looks up a path, so the purpose is clear.

Registering the tree will happen in a function to be added in a later
patch, called oftree_from_fdt().

Signed-off-by: Simon Glass <sjg@chromium.org>

Add a command to look at VBE methods and their status. Provide a test for
all of this as well.

Signed-off-by: Simon Glass <sjg@chromium.org>