drm: omapdrm: gem: Remove check for impossible condition

The GEM object can't be tiled without a usergart as that condition is
checked and considered as an error when creating the GEM object.

Signed-off-by: Laurent Pinchart <[e-mail]>
Signed-off-by: Tomi Valkeinen <[e-mail]>

drivers/gpu/drm/omapdrm/omap_gem.c

···
 		enum tiler_fmt fmt = gem2fmt(omap_obj->flags);
 		int i;
 
-		if (!priv->usergart)
-			return;
-
 		for (i = 0; i < NUM_USERGART_ENTRIES; i++) {
 			struct omap_drm_usergart_entry *entry =
 				&priv->usergart[fmt].entry[i];