drm/radeon: Move fb update from radeon_flip_work_func to radeon_crtc_page_flip

Fixes WARN()s from the DRM core since the page flip rework.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=77521
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_display.c

@@ -462,9 +462,6 @@ static void radeon_flip_work_func(struct work_struct *__work)
 	/* We borrow the event spin lock for protecting flip_work */
 	spin_lock_irqsave(&crtc->dev->event_lock, flags);
 
-	/* update crtc fb */
-	crtc->primary->fb = fb;
-
 	/* set the proper interrupt */
 	radeon_irq_kms_pflip_irq_get(rdev, radeon_crtc->crtc_id);
 
@@ -539,6 +536,9 @@ static int radeon_crtc_page_flip(struct drm_crtc *crtc,
 	}
 	radeon_crtc->flip_work = work;
 
+	/* update crtc fb */
+	crtc->primary->fb = fb;
+
 	spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
 
 	queue_work(radeon_crtc->flip_queue, &work->flip_work);