Revert"disp:msm:sde: update splash resource allocation for dual display"

This reverts commit dbb1a3eee9.
This change causes regression in populating cont splash data for RM.

Mot-CRs-fixed: (CR)

Change-Id: If239eb921e022fcad54033ae3c7e9e4c3dc54736
Signed-off-by: Nilaan Gunabalachandran <ngunabal@codeaurora.org>
Reviewed-on: https://gerrit.mot.com/1468943
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Shuo Yan <shuoyan@motorola.com>
Reviewed-by: Ling Jin <lingjin@motorola.com>
Reviewed-by: Bang Nguyen <bangnguyen@motorola.com>
Submit-Approved: Jira Key
Reviewed-on: https://gerrit.mot.com/1509826
Reviewed-by: Hua Tan <tanhua1@motorola.com>

msm/sde/sde_rm.c

@@ -1789,8 +1789,8 @@ int sde_rm_cont_splash_res_init(struct msm_drm_private *priv,
 			splash_display->cont_splash_enabled = true;
 			splash_display->ctl_ids[splash_display->ctl_cnt++] =
 				iter_c.blk->id;
-			index++;
 		}
+		index++;
 	}
 
 	return 0;