See 894e3a9ec8
("drivers/uart: Add a driver for SiFive's UART").
Change-Id: I035c238beba28ecafd296f18c0ccda167126ab94
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/27398
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>