drm/tidss: remove redundant assignment to variable ret

The assignment of zero to variable is redundant as the following
continue statement loops back to the start of the loop where
ret is assigned a new value from the return to the call to
get_parent_dss_vp. Remove assignment.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20250702084844.966199-1-colin.i.king@gmail.com
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

Author: ColinIanKing

drivers/gpu/drm/tidss/tidss_oldi.c

@@ -464,7 +464,6 @@ int tidss_oldi_init(struct tidss_device *tidss)
 				 * which may still be connected.
 				 * Continue to search for that.
 				 */
-				ret = 0;
 				continue;
 			}
 			goto err_put_node;