msmfb: mdss: add request for MDP DSI clock in MDP3 driver

MDP DSI clock is used for the MDP DSI video interface.  Request bus bandwidth
before issuing DSI DMA commands.

Change-Id: I39450db57b708ef139c60c6f510c6940336f0b6b
Signed-off-by: Xiaoming Zhou <zhoux@codeaurora.org>
3 files changed