Patch merged into coreboot/master: soc/broadwell: set EM4/EM5 registers based on cdclk

the following patch was just integrated into master:
commit f8960a6149578172d37c3223e5309da2d14f3da6
Author: Matt DeVillier 
Date:   Wed Nov 16 23:37:43 2016 -0600

soc/broadwell: set EM4/EM5 registers based on cdclk

The EM4/EM5 registers in the mini-HD audio device must be set based
    on the GPU cdclk value in order for HDMI audio to function properly.
    Add variables to save the correct values when initializing the GPU,
    and accessor functions to retrieve them in order to set the registers
    when initializing the mini-HD audio device.

Change-Id: Icce7d5981f0b2ccb09d3861b28b843a260c8aeba
    Signed-off-by: Matt DeVillier 
    Reviewed-on: https://review.coreboot.org/17718
    Tested-by: build bot (Jenkins)
    Reviewed-by: Nico Huber

See https://review.coreboot.org/17718 for details.

-gerrit