Integrate linux-guf/linux-5.15.29-guf_drm_panel_err_fix

Commit: seco-ne/kernel/linux-guf@7eca3a36

panel-dt: fix number of found panel modes

The following errors can be observed in dmesg on some boards (e.g. SANTINO/SANTINO-LT): [ 3.102655] /disp0: could not find display-timings node [ 3.108037] /disp0: no timings specified

It looks like panel_dt_get_non_edid_modes() was made from panel_simple_get_non_edid_modes() of drivers/gpu/drm/panel/panel-simple.c but increasing number of found modes was omited.

panel-simple.c has this code: 283- if (mode) { 284- drm_mode_probed_add(connector, mode); 285: num = 1; 286- } else {

So add the same assignment in panel-dt.c too.