Patch merged into coreboot/master: rk3399: display: Use edid_set_framebuffer_bits_per_pixel() helper

the following patch was just integrated into master:
commit e74f5eaa432b6483da56c5e964a6f5fbf29cbaed
Author: Julius Werner 
Date:   Mon Oct 17 18:14:41 2016 -0700

rk3399: display: Use edid_set_framebuffer_bits_per_pixel() helper

This refactoring was already carried into RK3288 with commit 6911219
    (edid: Add helper function to calculate bits-per-pixel dependent values)
    but it seems that the code for RK3399 was copy&pasted from it too early
    to pick this up. Fix that so that future Rockchip SoCs can copy&paste
    the right thing.

Change-Id: I5050c58d18db38fffabc7666e67a622d4a828590
    Signed-off-by: Julius Werner 
    Reviewed-on: https://review.coreboot.org/17050
    Tested-by: build bot (Jenkins)
    Reviewed-by: David Hendricks 
    Reviewed-by: Paul Menzel 
    Reviewed-by: Patrick Georgi

See https://review.coreboot.org/17050 for details.

-gerrit