dt-bindings: display: panel: properly document LG LD070WX3 panel

dt-bindings: display: panel: properly document LG LD070WX3 panel

LG LD070WX3-SL01 was mistakenly documented as a simple DSI panel, which it
clearly is not. Address this by adding the proper schema for this panel.

There is only one user of this panel binding in the mainline Linux kernel,
which is the Nvidia tablet Tegra Note 7. Its panel is broken anyway since
it cannot initialize properly if the bootloader does not leave a
pre-initialized panel. It also cannot suspend or re-initialize properly,
since no DSI configuration is set and it has a loose regulator which
relies on an always-on property rather than being hooked to the panel
where it belongs.

Tegra Note 7 device tree is adjusted as a part of this series.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20251110091440.5251-2-clamor95@gmail.com