disp: msm: sde: add per_pipe_bw_high option

This change populates values for per_pipe_bw_high
from the device tree. This value is exposed to userspace
as the bandwidth per pipe available in the no VFE
scenario.

Change-Id: I61346ee55dfd4b6b0736ecf0b96e061f4f3934c3
Signed-off-by: Samantha Tran <samtran@codeaurora.org>