msm: mdss: program vbif and QoS settings from device tree

MDSS VBIF and QoS settings can differ across targets, move the setup of
these settings to device tree to allow different settings to be set
depending on specific targets.

Change-Id: Idf7dca0f19a3a694d3da3f2af662077bac445636
Signed-off-by: Adrian Salido-Moreno <adrianm@codeaurora.org>
4 files changed