Rename hipos-kirkwood to hikirk.

    Incomplete! Currently the patches have been reworked.
    defconfig has not been changed yet. Also, HIKIRK identifiers
    will have to be changed somewhere...

    This patches the kernel's sources accordingly.

    HYP-7326

Signed-off-by: Angelika Tobisch <tobisch@dresearch-fe.de>
Signed-off-by: Mario Schuknecht <m.schuknecht@dresearch.de>