drm/panel: nv3052c: Document known register names

drm/panel: nv3052c: Document known register names

Many of these registers have a known name in the public datasheet.
Document them as comments for reference.

Signed-off-by: John Watts <contact@jookia.org>
Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20231210-fs035vg158-v5-1-d75adc75571f@jookia.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231210-fs035vg158-v5-1-d75adc75571f@jookia.org