drm/panel: jadard-jd9365da-h3: support variable DSI configuration

drm/panel: jadard-jd9365da-h3: support variable DSI configuration

Several panels support attachment either using 4 DSI lanes or just 2. In
some cases, this requires a different panel mode to fulfill clock
requirements. Extend the driver to handle such cases by letting the
panel description to omit lanes specification and parsing number of
lanes from the DT.

Reviewed-by: Linus Walleij <linusw@kernel.org>
Tested-by: Riccardo Mereu <r.mereu@arduino.cc>
Link: https://patch.msgid.link/20260413-waveshare-dsi-touch-v3-12-3aeb53022c32@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>