Would you mind to split this into separate commits? There are
at least 4 things done here:

• Some random cleanup lines for bayou.
• Giving NO_RELOCATABLE_RAMSTAGE a prompt.
• Adding payloads/payloader.
• Adding transforms.

Only the last point is mentioned in the summary line. I have
some comments that would better be placed on individual commits,
e.g.

• Why not make the prompt for RELOCATABLE_RAMSTAGE?
• How does it relate to `config RAMPAYLOAD`?
• What other transforms to imagine? Do they have special dependencies?
• If it's just an additional makefile why not place it below util/?

Also, please adhere to the line length limit in commit messages.
For reference this is how Gerrit shows yours in a narrow browser
window (it breaks at 72 chars):

    add transforms

    Transforms transform coreboot ROM images to add or remove capabilities.
    They let us test out new ideas for coreboot while not impacting
    the coreboot source in any way.

    So, for example, should we want an image with a rampayload, we can
    run the normal build process and then transform the resulting rom image
    as needed.

    We can implement a postcar stage which loads a ram payload directly,
    and do so in a way which has no impact on the coreboot source.

    This not only lets us change the output of the build process, it can be
    implemented
    without changing the coreboot source. Further, since the transform
    Makefile depends
    on the presence of a coreboot.rom in the directory, we can avoid the
    build step
    if we're just trying to transform a ROM we read from a FLASH part. Just
    flashrom
    -r the image, drop it into coreboot.rom in this directory, and no build
    will be attempted.

    This example represents the first steps of building a rampayload
    transform.

    Transforms should have zero impact on the $(top)/src tree, since they
    are intended to be able to be used on prebuilt images. I did have to
    make
    one thing user selectable, namely, NO_RELOCATABLE_RAMSTAGE.

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