serial: sirf: enable ATLAS7 USP serial support
differentiate difference port types by re-defining the status MARCO or putting HW differences into private data of the related ports. Signed-off-by: NQipan Li <Qipan.Li@csr.com> Signed-off-by: NBarry Song <Baohua.Song@csr.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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