Revert "msm: mdss: Fix mdss_dsi_cmd_mdp_busy timeout error"

This reverts commit 2284bdc4b79b3e1dcf5e1c8f0aafce7bd96428e3.
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>
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>