ARM: dts: msm: Change display rsc to use AMC votes for sm6150

Since display RSCs have their own dedicated AMC TSC,
they no longer need to repurpose a single TSC for both
wake and AMC.
Also add CN1 BCM node and update the DDR bus width.

Change-Id: Ieefa4fa8e0202ce9720eec7827e698b4b98b91d5
Signed-off-by: Odelu Kukatla <okukatla@codeaurora.org>