drm/panel: simple: Add PrimeView PM070WL4 support

drm/panel: simple: Add PrimeView PM070WL4 support

Add support for PrimeView PM070WL4 7.0" (800x480) TFT-LCD panel.
Datasheet can be found at [1].

[1] https://www.beyondinfinite.com/lcd/Library/Pvi/PM070WL4-V1.0.pdf

Signed-off-by: Primoz Fiser <primoz.fiser@norik.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240606080104.3663355-3-primoz.fiser@norik.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240606080104.3663355-3-primoz.fiser@norik.com