drm/vblank: remove superfluous pipe check

Now that the pipe is crtc->pipe, there's no need to check it's within
range.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patch.msgid.link/ced963542bfb00c2f1a653e9e5f717fccbd25132.1765290097.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Author: jnikula

drivers/gpu/drm/drm_vblank.c

@@ -1302,9 +1302,6 @@ void drm_crtc_wait_one_vblank(struct drm_crtc *crtc)
 	int ret;
 	u64 last;
 
-	if (drm_WARN_ON(dev, pipe >= dev->num_crtcs))
-		return;
-
 	ret = drm_vblank_get(dev, pipe);
 	if (drm_WARN(dev, ret, "vblank not available on crtc %i, ret=%i\n",
 		     pipe, ret))