dt-bindings: display: Document Himax HX8394 panel rotation

Document panel rotation for Himax HX8394 display panel.

Signed-off-by: Chris Morgan <[e-mail]>
Acked-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Neil Armstrong <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

Documentation/devicetree/bindings/display/panel/himax,hx8394.yaml

···
 
   backlight: true
 
+  rotation: true
+
   port: true
 
   vcc-supply: