serial: exar: split out the exar code from 8250_pci
Add the serial driver for the Exar chips. And also register the platform device for the GPIO provided by the Exar chips. Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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