drm/msm/dsi-staging: add clock and power utilities

Add clock and power utilities for DSI driver components.
Read the clocks, regulators, gpios etc from device tree
and make them available for use.

Change-Id: Id3b08bac976da6834e636cbd79d05b3ba4b91557
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>
3 files changed