dt-bindings: display: simple: Add Startek KD070WVFPA043-C069A panel

Add Startek KD070WVFPA043-C069A 7" TFT LCD panel compatible string.

Signed-off-by: Fabio Estevam <festevam@denx.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220429172056.3499563-1-festevam@gmail.com