There're more panels with ILI9881C controller than the Bananapi one supported by this driver. Extract the mode and init sequence part, to prepare the driver for adding new panels. Signed-off-by: Icenowy Zheng <icenowy@aosc.io> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20200719170411.275812-2-icenowy@aosc.io