[coreboot-gerrit] Patch merged into coreboot/master: mb/lowrisc/nexys4ddr: Actually fix the UART clock setup

the following patch was just integrated into master:
commit 7ca9b8ae5014a745855296903682ae803235cb35
Author: Jonathan Neuschäfer 
Date:   Sat Oct 29 21:48:18 2016 +0200

mb/lowrisc/nexys4ddr: Actually fix the UART clock setup

Ron's code calculated the DLL and DLM registers of the 8250 UART, but
    that's the job of the UART driver. uart_input_clock_divider isn't needed
    anymore because the default value of 16 works.

As a bonus, the baud rate can now be selected in Kconfig, instead of
    being hardcoded at 115200.

TEST=Booted the board at 9600 and 115200 baud.

Change-Id: I3d5e49568b798a6a6d944db1161def7d0a2d3b48
    Signed-off-by: Jonathan Neuschäfer 
    Reviewed-on: https://review.coreboot.org/17188
    Tested-by: build bot (Jenkins)
    Reviewed-by: Paul Menzel 
    Reviewed-by: Martin Roth 
    Reviewed-by: Ronald G. Minnich

See https://review.coreboot.org/17188 for details.

-gerrit