msm: mdss: Fix mdss_dsi_cmd_mdp_busy timeout error

Make MDSS clock ON before sending DCS command  to fix
mdss_dsi_cmd_mdp_busy timeout error.

Change-Id: I78a5931715f7a8803af77cd43c6191c225bcecd8
Signed-off-by: Pawan Kumar <pavaku@codeaurora.org>
msm: mdss: Change wait_for_completion to timeout in MDSS DSI driver

In mdss_dsi_cmd_mdp_busy function in MDSS DSI driver, change the
wait_for_completion to timeout variant. This avoids watchdog
resets during stability tests.

Change-Id: Ia85a5f61300e59382ae8dcf2ca67b5d7285a98e7
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>
Merge "msm: mdss: Change wait_for_completion to timeout in MDSS DSI driver" into jb_3.2_rb5.37