Add support for multiple drm_display_mode entries. This will allow to add a 50 Hz mode later. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Link: https://patchwork.freedesktop.org/patch/msgid/20200408095830.8131-1-paul@crapouillou.net Acked-by: Sam Ravnborg <sam@ravnborg.org>