Revert "disp: msm: dsi: allow cmd-engine enable/disable HW op at all times"

This reverts commit 65f3cc37a4.

This change breaks TUI use-cases by allowing CMD engine to be
disabled on trusted VM without primary VM having knowledge of
this HW update.

Change-Id: Ieb67dc841299a149e9f1028fd8f98bd857f1f711
Signed-off-by: Steve Cohen <cohens@codeaurora.org>

msm/dsi/dsi_ctrl.h

@@ -646,6 +646,8 @@ int dsi_ctrl_set_power_state(struct dsi_ctrl *dsi_ctrl,
  * dsi_ctrl_set_cmd_engine_state() - set command engine state
  * @dsi_ctrl:            DSI Controller handle.
  * @state:               Engine state.
+ * @skip_op:             Boolean to indicate few operations can be skipped.
+ *                       Set during the cont-splash or trusted-vm enable case.
  *
  * Command engine state can be modified only when DSI controller power state is
  * set to DSI_CTRL_POWER_LINK_CLK_ON.
@@ -653,7 +655,7 @@ int dsi_ctrl_set_power_state(struct dsi_ctrl *dsi_ctrl,
  * Return: error code.
  */
 int dsi_ctrl_set_cmd_engine_state(struct dsi_ctrl *dsi_ctrl,
-				  enum dsi_engine_state state);
+				  enum dsi_engine_state state, bool skip_op);
 
 /**
  * dsi_ctrl_validate_host_state() - validate DSI ctrl host state