Revert "disp: msm: sde: turn off/on vblank callbacks as per crtc"

This reverts commit 16bfab7ddf.

Change-Id: I5c5ef6a2fcb83607acd2c737f574199c010c89fa
Signed-off-by: Manoj Kumar AVM <manojavm@codeaurora.org>

msm/msm_drv.c

@@ -699,7 +699,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
 	struct msm_kms *kms = NULL;
 	int ret;
 	struct sched_param param = { 0 };
-	struct drm_crtc *crtc;
 
 	ddev = drm_dev_alloc(drv, dev);
 	if (!ddev) {
@@ -771,9 +770,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
 		goto fail;
 	}
 
-	drm_for_each_crtc(crtc, ddev)
-		drm_crtc_vblank_reset(crtc);
-
 	if (kms) {
 		pm_runtime_get_sync(dev);
 		ret = drm_irq_install(ddev, platform_get_irq(pdev, 0));