Enable offloading of display_write call to background thread for color
displays. This feature is opt-in, as it may offer significant
performance gains for every display pipeline.
When enabled display_write and lv_disp_flush_ready will be called from a
background thread. This means that while the display driver waits on the
hardware to render the framebuffer, the LVGL rendering thread will not
be blocked.
Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>