disp: msm: dsi: Add print info for DSI_CTRL

Add the DSI_CTRL index to indicate which DSI_CTRL is enable.

Port from: 559a1c5

Change-Id: Id9a60c5cfcb5c4f7959c10987d85eb17062fa15e
Signed-off-by: Bang Nguyen <bangnguyen@motorola.com>
Reviewed-on: https://gerrit.mot.com/1444408
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Submit-Approved: Jira Key
Reviewed-on: https://gerrit.mot.com/1509811
Reviewed-by: Hua Tan <tanhua1@motorola.com>

msm/dsi/dsi_display.c

@@ -7433,6 +7433,7 @@ int dsi_display_prepare(struct dsi_display *display)
 {
 	int rc = 0;
 	struct dsi_display_mode *mode;
+	struct dsi_display_ctrl *ctrl = &display->ctrl[0];
 
 	if (!display) {
 		DSI_ERR("Invalid params\n");
@@ -7444,7 +7445,9 @@ int dsi_display_prepare(struct dsi_display *display)
 		return -EINVAL;
 	}
 
-	DSI_INFO("%s(%s)+\n", __func__, display->drm_conn->name);
+	DSI_INFO("panel_name=%s ctrl-index=%d\n",
+		display->panel->name, ctrl->ctrl->cell_index);
+
 	SDE_EVT32(SDE_EVTLOG_FUNC_ENTRY);
 	mutex_lock(&display->display_lock);