msm: mdss: Program DSI regulator config from device tree

Regulators needed for DSI controller can vary based on the
platform and should be specified in the corresponding device
tree node. This change parses power related data from the
device tree and uses the existing power configuration utilities
to configure the regulators.

Change-Id: I7e57fa4b17d540acefba58e050cf8057d05637a3
Signed-off-by: Aravind Venkateswaran <aravindh@codeaurora.org>
5 files changed